bp_get_document_preview_attachment_id()

function bp_get_document_preview_attachment_id() {
	global $document_template;

	$attachment_id = 0;
	if ( isset( $document_template->document->attachment_id ) ) {
		$attachment_id = $document_template->document->attachment_id;
	}

	/**
	 * Filters the document preview attachment id being displayed.
	 *
	 * @since BuddyBoss 1.4.0
	 *
	 * @param int $id The document preview attachment id.
	 */
	return apply_filters( 'bp_get_document_preview_attachment_id', $attachment_id );
}