Method execute

src/ExtOperator.actor.cpp:264–270

struct ExtUpdateOperatorUnset {
	static const char* name;
	static Future<Void> execute(Reference<IReadWriteContext> cx,
	                            StringRef const& path,
	                            bson::BSONElement const& element) {
		cx->getSubContext(path)->clearDescendants();
		cx->clear(path);
		return Void();
	}
};
REGISTER_UPDATE_OPERATOR(ExtUpdateOperatorUnset, "$unset");