WordPress at a glance
function is not described

WP_Customize_Manager::set_changeset_lock() public WP 4.9.0

Marks the changeset post as being currently edited by the current user.

{} It's a method of the class: WP_Customize_Manager{}

No Hooks.

Return

null. Nothing.

Usage

$WP_Customize_Manager = new WP_Customize_Manager();
$WP_Customize_Manager->set_changeset_lock( $changeset_post_id, $take_over );
$changeset_post_id(int) (required)
Changeset post ID.
$take_over(true|false)
Whether to take over the changeset.
Default: false

Changelog

Since 4.9.0 Introduced.

Code of WP_Customize_Manager::set_changeset_lock() WP 5.7.2

<?php
public function set_changeset_lock( $changeset_post_id, $take_over = false ) {
	if ( $changeset_post_id ) {
		$can_override = ! (bool) get_post_meta( $changeset_post_id, '_edit_lock', true );

		if ( $take_over ) {
			$can_override = true;
		}

		if ( $can_override ) {
			$lock = sprintf( '%s:%s', time(), get_current_user_id() );
			update_post_meta( $changeset_post_id, '_edit_lock', $lock );
		} else {
			$this->refresh_changeset_lock( $changeset_post_id );
		}
	}
}