public function delete($query, array $options = []) {
		$this->_checkConnection();

		$defaults = [
			'justOne' => false,
			'w' => $this->_config['w'],
			'wTimeoutMS' => $this->_config['wTimeoutMS'],
			'fsync' => false
		];
		$options = array_intersect_key($options + $defaults, $defaults);
		$params = compact('query', 'options');

		return Filters::run($this, __FUNCTION__, $params, function($params) {
			$prefix = $this->_config['gridPrefix'];

			$query = $params['query'];
			$options = $params['options'];
			$args = $query->export($this, ['keys' => ['source', 'conditions']]);
			$source = $args['source'];
			$conditions = $args['conditions'];

			if ($source === "{$prefix}.files") {
				$result = $this->_deleteFile($conditions);
			} else {
				$result = $this->connection->{$args['source']}->remove($conditions, $options);
				$result = $this->_ok($result);
			}
			if ($result && $query->entity()) {
				$query->entity()->sync(null, [], ['dematerialize' => true]);
			}
			return $result;
		});
	}