private Listing getListing(Symbol s) {
		Program p = s.getProgram();
		if (p != null) {
			return p.getListing();
		}
		return null; // not sure if this can happen
	}
Get the ScreenElement corresponding to the type of the reference.
@param p the program
@param r the reference to inspect
@return the screen element
Ghidra/Features/Base/src/main/java/ghidra/app/util/SymbolInspector.java