public function set_query( WP_Query $query ) {
		if (
			$this->last_built_query instanceof WP_Query
			&& !empty($this->last_built_query->request)
		){
			throw Tribe__Repository__Usage_Error::because_query_cannot_be_set_after_it_ran();
		}
		$this->last_built_query = $query;
		$this->last_built_hash  = $this->hash();

		return $this;
	}