Function mozjs::jsapi::JS_SetGrayGCRootsTracer

pub unsafe extern "C" fn JS_SetGrayGCRootsTracer(
    cx: *mut JSContext,
    traceOp: Option<unsafe extern "C" fn(_: *mut JSTracer, _: *mut SliceBudget, _: *mut c_void) -> bool>,
    data: *mut c_void
)