Hi, I wanted to try to create an extension, but I ran into the error "extId is required" as soon as I call api('createCommand', { ... }). I copied the code from[https://github.com/dillonHe/EasyEDA-Documents/blob/master/API/example/theme/main.js](https://github.com/dillonHe/EasyEDA-Documents/blob/master/API/example/theme/main.js) and pasted it into Tools -> Extensions -> Run Script. Also tried this simple code in Tools -> Extensions -> Run Script: `api('createToolbarButton', {` `    title:'Shape',` `    fordoctype:'pcb',` `    "menu" : [` `        {"text":"Log Selection", "cmd":"extension-debugshape-log"},` `    ]` `});``api('createCommand', {` `    'extension-debugshape-log' : function() {` `        console.log(api('getSelectedIds'));` `    }` `});` Toolbar button shows up, but same error on createCommand Since I found no documentation ... what is wrong?