Function js::jsapi::JS_CopyPropertiesFrom

pub unsafe extern "C" fn JS_CopyPropertiesFrom(
    cx: *mut JSContext, 
    target: HandleObject, 
    obj: HandleObject
) -> bool

Copies all own properties from |obj| to |target|. |obj| must be a "native" object (that is to say, normal-ish - not an Array or a Proxy).

This function immediately enters a compartment, and does not impose any restrictions on the compartment of |cx|.