pdate the reference for.
	 * @param string         $value      The value of the reference key.
	 * @return integer|boolean
	 */
	public function update_reference( $object_id = 0, string $field_name = '', string $value = '' ) {
		return update_metadata( $this->location_type, $object_id, $this->reference_prefix . $field_name, $value );
	}

	/**
	 * Deletes a field value from the database.
	 *
	 * @since 6.4
	 *
	 * @param integer|string $object_id The ID of the object the metadata is for.
	 * @param array          $field     The field array.
	 * @return boolean
	 */
	public function delete_value( $object_id = 0, array $field = array() ): bool {
		return delete_metadata( $this->location_type, $object_id, $field['name'] );
	}

	/**
	 * Deletes a reference key from the database.
	 *
	 * @since 6.4
	 *
	 * @param integer|string $object_id  The ID of the object the metadata is for.
	 * @param string         $field_name The name of the field to delete the reference from.
	 * @return boolean
	 */
	public function delete_reference( $object_id = 0, string $field_name = '' ): bool {
		return delete_metadata( $this->location_type, $object_id, $this->reference_prefix . $field_name );
	}
}