* @param  int    $object_id    WP Post ID of the lesson, section, course or track
	 * @param  string $trigger      String describing the reason for mark completion
	 * @return bool
	 * @since    3.3.1
	 * @version  3.21.0
	 */
	private function insert_completion_postmeta( $object_id, $trigger = 'unspecified' ) {

		// Add info to the user postmeta table.
		$user_metadatas = array(
			'_is_complete'        => 'yes',
			'_completion_trigger' => $trigger,
		);

		$update = llms_bulk_update_user_postmeta( $this->get_id(), $object_id, $user_metadatas, false );

		// Returns an array with errored keys or true on success.
		return is_array( $update ) ? false : true;

	}

	/**
	 * Add student postmeta data for incompletion of a lesson, section, course or track
	 * An "_is_complete" value of "no" is inserted into postmeta
	 *
	 * @param    int    $object_id    WP Post ID of the lesson, section, course or track
	 * @param    string $trigger      String describing the reason for mark incompletion
	 * @return   boolean
	 * @since    3.5.0
	 * @version  3.24.0
	 */
	private function insert_incompletion_postmeta( $object_id, $trigger = 'unspecified' ) {

		global $wpdb;

		// Add '_is_complete' to the user postmeta table for object.
		$user_metadatas = array(
			'_is_complete'        => 'no',
			'_completion_trigger' => $trigger,
		);

		foreach ( $user_metadatas as $key => $value ) {

			/**
			 * It's too difficult to keep track of multiple postmetas for each lesson incomplete
			 * Instead, I'm just replacing the old '_is_complete' value with 'no'
			 *