https://docs.godotengine.org/en/stable/tutorials/scripting/c_sharp/diagnostics/GD0110.html
GD0110: The exported tool button is not a Callable — Godot Engine (stable) documentation in English
,,,,,, Rule ID, GD0110,, Category, Usage,, Fix is breaking or non-breaking, Breaking - If the property's type is changed to Callable Non-breaking - If...