Find callback function of custom meta box

Question

I am reordering the default meta box layout in the following way:

add_action('do_meta_boxes', 'move_meta_box');

function move_meta_box(){
    remove_meta_box( 'my-itemsdiv', 'post', 'side' );
    remove_meta_box( 'submitdiv', 'post', 'side' );
    add_meta_box('my-itemsdiv', __('Something something'), 'X', 'my-item', 'normal', 'high');
    add_meta_box('submitdiv', __( 'Submit item' ), 'post_submit_meta_box', 'my-item', 'normal', 'high' );
}

Problem: my-itemsdiv is a custom meta box for the theme and I don't know what callback function to call ("X").

Question: Is there any way I can find out what callback function is used for this meta box? What should I search for? (This theme has quite a bit of code..)

Answer 1

Please search for 'my-itemsdiv' or "my-itemsdiv" in your theme directory. I'm sure you'll find out the callback function. Because the meta box is registered with the same id. If there's any chance that the meta box is registered via a plugin then find out the plugin first then search in that plugin directory.