fails:Module#class_variable_defined? returns true if a class variable with the given name is defined in self
fails:Module#class_variable_defined? returns true if a class variable with the given name is defined in the metaclass
fails:Module#class_variable_defined? returns true if the class variable is defined in a metaclass
fails:Module#class_variable_defined? returns false if the class variable is not defined in a metaclass
fails:Module#class_variable_defined? returns true if a class variables with the given name is defined in an included module
fails:Module#class_variable_defined? returns false if a class variables with the given name is defined in an extended module
fails:Module#class_variable_defined? raises a NameError when the given name is not allowed
fails:Module#class_variable_defined? converts a non string/symbol/fixnum name to string using to_str
fails:Module#class_variable_defined? raises a TypeError when the given names can't be converted to strings using to_str
