Function NewFunctionByIdWithReservedAndProto 

pub unsafe fn NewFunctionByIdWithReservedAndProto(
    cx: *mut JSContext,
    native: JSNative,
    proto: HandleObject<'_>,
    nargs: c_uint,
    flags: c_uint,
    id: jsid,
) -> *mut JSFunction

👎Deprecated:

Use wrappers2 instead