Function create_callback_interface_object 

pub(crate) fn create_callback_interface_object<D: DomTypes>(
    cx: JSContext,
    global: HandleObject<'_>,
    constants: &[Guard<&[ConstantSpec]>],
    name: &CStr,
    rval: MutableHandleObject<'_>,
)

Create and define the interface object of a callback interface.