@Override
	public boolean canDelete() {
		return true;
	}
This method is handy to signal whether this node is can be used to perform actions. Returning
false from this method is essentially a way to disable the actions that can be performed upon
this node.

@return true if this node is enabled.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/datamgr/tree/CategoryNode.java