public function set_object_type( $object_type ) {
		if ( ! in_array( $object_type, $supported = [ 'user', 'comment', 'term', 'post' ] ) ) {
			// @codingStandardsIgnoreLine
			_doing_it_wrong( __FUNCTION__, 'The object type must be one of: ' . implode( ', ', $supported ), null );
		}

		$this->object_type = $object_type;

		return $this;
	}