Teek::UI::NotRealizedError Class

Raised by any genuinely realize-only method (Session#app, dialogs, #clipboard, Handle#path/#configure/#modal/#grab_release, …) called before its node/session has been realized. These don’t queue for later - the whole point of a Tk-free build phase is that nothing is pretending to talk to an interpreter that doesn’t exist yet, and each of these either IS the live app/widget by definition or needs one to do anything meaningful (grabbing input, popping a native dialog). In practice this is rarely hit in real code: all of them are normally called from inside an on_* event handler, which only ever runs after realize - see Session#every/Session#after for the one case that genuinely IS deferrable, and queues instead.