hasKey
                                        
                                         static 
                                        
                                        void
                                            hasKey
                                           (
                                                
                                                        
                                                         propertyName
                                                    
                                                
                                                        , 
                                                         object
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        
                                        
                                        
                                            Asserts that an object has a property with the given name.
                                        
                                        - Parameters:
- 
                                                        propertyName <String>The name of the property to test.
- 
                                                        object <Object>The object to search.
- 
                                                        message <String>(Optional) The message to display if the assertion fails.
hasKeys
                                        
                                         static 
                                        
                                        void
                                            hasKeys
                                           (
                                                
                                                        
                                                         properties
                                                    
                                                
                                                        , 
                                                         object
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        
                                        
                                        
                                            Asserts that an object has all properties of a reference object.
                                        
                                        - Parameters:
- 
                                                        properties <Array>An array of property names that should be on the object.
- 
                                                        object <Object>The object to search.
- 
                                                        message <String>(Optional) The message to display if the assertion fails.
ownsKey
                                        
                                         static 
                                        
                                        void
                                            ownsKey
                                           (
                                                
                                                        
                                                         propertyName
                                                    
                                                
                                                        , 
                                                         object
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        
                                        
                                        
                                            Asserts that a property with the given name exists on an object instance (not on its prototype).
                                        
                                        - Parameters:
- 
                                                        propertyName <String>The name of the property to test.
- 
                                                        object <Object>The object to search.
- 
                                                        message <String>(Optional) The message to display if the assertion fails.
ownsKeys
                                        
                                         static 
                                        
                                        void
                                            ownsKeys
                                           (
                                                
                                                        
                                                         properties
                                                    
                                                
                                                        , 
                                                         object
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        
                                        
                                        
                                            Asserts that all properties exist on an object instance (not on its prototype).
                                        
                                        - Parameters:
- 
                                                        properties <Array>An array of property names that should be on the object.
- 
                                                        object <Object>The object to search.
- 
                                                        message <String>(Optional) The message to display if the assertion fails.
ownsNoKeys
                                        
                                         static 
                                        
                                        void
                                            ownsNoKeys
                                           (
                                                
                                                        
                                                         object
                                                    
                                                
                                                        , 
                                                         message
                                                    
                                                
                                            )
                                        
                                        
                                        
                                            Asserts that an object owns no properties.
                                        
                                        - Parameters:
- 
                                                        object <Object>The object to check.
- 
                                                        message <String>(Optional) The message to display if the assertion fails.