code: function addMethod(func, name) {
      var newMethods = methods.MethodDictionary.concat(
        _methods,
        func,
        name
      );
  
      if (_Entity) {
        _loadEntityMethod(func, name);
      }
  
      _methods = newMethods;
    }
docs: Adds a new method to the methods in the specification.
  @name module:back4app-entity/models.EntitySpecification#addMethod
  @function
  @param {!function} func This is the method's function to be added.
  @param {!string} name This is the name of the method.
  @example
  entitySpecification.addMethod(
  function () { return 'newMethod'; },
  'newMethod'
  );