dispose method Null safety
Removing an object from memory. Must be called manually.
Implementation
void dispose() {
if (_isDisposed) return;
var exception = _getException();
var destructor =
_dll_handle.lookupFunction<_Context_Destruct_c, _Context_Destructor_dart>(_context_namespace + 'destroy');
destructor(this._impl, exception);
tdvCheckException(exception, _dll_handle);
_isDisposed = true;
}