private AddressSetView getGraphScopeAndGenerateGraphTitle() {
		if (selection != null && !selection.isEmpty()) {
			graphTitle += selection.getMinAddress().toString();
			return selection;
		}
		Function function = getContainingFunction(location);
		if (function != null) {
			graphTitle += function.getName();
			if (isCallGraph()) {
				return getScopeForCallGraph(function);
			}
			return function.getBody();
		}
		graphTitle += "(Entire Program)";
		return blockModel.getProgram().getMemory();
	}
Set the maximum number of code lines which will be used per block when
showCode is enabled.
@param maxLines maximum number of code lines
Ghidra/Features/ProgramGraph/src/main/java/ghidra/graph/program/BlockGraphTask.java