allowInteropCaptureThis function
Implementation
Function allowInteropCaptureThis(Function f) {
if (JS('bool', 'typeof(#) == "function"', f)) {
// Behavior when the function is already a JS function is unspecified.
throw new ArgumentError(
"Function is already a JS function so cannot capture this.");
return f;
} else {
return _convertDartFunctionFastCaptureThis(f);
}
}