getCallbackFromHandle method

Function getCallbackFromHandle (CallbackHandle handle)

Get a tear-off of a named top-level or static callback represented by a handle.

handle must not be null.

If handle is not a valid handle returned by PluginUtilities.getCallbackHandle, null is returned. Otherwise, a tear-off of the callback associated with handle is returned.

Implementation 

static Function getCallbackFromHandle(CallbackHandle handle) {
  assert(handle != null, "'handle' must not be null.");
  return _backwardCache.putIfAbsent(
      handle, () => _getCallbackFromHandle(handle.toRawHandle()));
}