whole_func_string: function addWECPropertyIfDefined(object, property, value) {
    if (!IS_UNDEFINED(value)) {
      defineWECProperty(object, property, value);
    }
  }
func_code_string: function addWECPropertyIfDefined(object, property, value) {
    if (!IS_UNDEFINED(value)) {
      defineWECProperty(object, property, value);
    }
  }
func_documentation_string: Adds property to an object if the value is not undefined.
  Sets all descriptors to true.