rangeOfString_ method
Implementation
void rangeOfString_(ffi.Pointer<_NSRange> stret, NSString searchString) {
_lib._objc_msgSend_useVariants1
? _lib._objc_msgSend_339_stret(
stret, _id, _lib._sel_rangeOfString_1, searchString._id)
: stret.ref = _lib._objc_msgSend_339(
_id, _lib._sel_rangeOfString_1, searchString._id);
}