Using placeholders in the commands section

[Lemvs]

Ability to use placeholders ({}, {0}...) in the commands section of menu files, for example if in the items section I can use the {0} placeholder for some item to display the player's name, I should also be able to use this placeholder for this item in the commands section, so I can execute some command with this player's name (such an option would be helpful for example in the 'coops' menu, where there is no action after clicking on the player's head, and I would like to make it so that clicking on it removes the player from coop)