Editor.getSelected() in run:open-assets

Hello! I want without having to create a new block button, and stopping the event associated to the image that this run:open-assets get the area created by the editor in the canvas and add there the image that I got with my personalized modal image. I want to clarify that when I double-click on the image inside the canvas and select the image from my image manager it is updated correctly with editor.getSelected(), but when I add it from the block panel, it doesn't get the select object and gives me an error: don't find the getSelected function. Is there any other way to solve this?