acf/in_admin_header │ action-hook │ ACF 1.0

Usage

add_action( 'acf/in_admin_header', 'wp_kama_acf_in_admin_header_action' );

/**
 * Function for `acf/in_admin_header` action-hook.
 * 
 * @return void
 */
function wp_kama_acf_in_admin_header_action(){
	// action...
}

Where the hook is called

do_action( 'acf/in_admin_header' );

Where the hook is used in Advanced Custom Fields PRO

add_action( 'acf/in_admin_header', array( $this, 'maybe_show_license_status_error' ) );