Method on

packages/opencode/test/cli/cmd/tui/attention.test.ts:20–23

(event: FocusEvent, listener: () => void)

  }

  on(event: FocusEvent, listener: () => void) {
    this.listeners[event].add(listener)
    return this
  }

  off(event: FocusEvent, listener: () => void) {
    this.listeners[event].delete(listener)