this: void,

{ enumerable, configurable, get, set, writable, value }: PropertyDescriptor

): PropertyDescriptor {

const descriptor: PropertyDescriptor = {

enumerable: enumerable === true,

configurable: configurable === true,

};

const hasGetterOrSetter = get !== undefined || set !== undefined;

const hasValueOrWritableAttribute = writable !== undefined || value !== undefined;

if (hasGetterOrSetter && hasValueOrWritableAttribute) {

throw "Invalid property descriptor. Cannot both specify accessors and a value or writable attribute.";

}

if (get || set) {

descriptor.get = get;

descriptor.set = set;

} else {

descriptor.value = value;

descriptor.writable = writable === true;

}

return descriptor;