Method writeKey_impl

fdbclient/FileBackupAgent.actor.cpp:562–567

	// Write begin key or end key.
	ACTOR static Future<Void> writeKey_impl(RangeFileWriter* self, Key k) {
		int toWrite = sizeof(uint32_t) + k.size();
		wait(self->newBlockIfNeeded(toWrite));
		wait(self->file->appendStringRefWithLen(k));
		return Void();
	}

	Future<Void> writeKey(Key k) { return writeKey_impl(this, k); }