boolean isShowingLocation(ProgramLocation location) {
		if (currentFunction == null) {
			return false;
		}

		AddressSetView body = currentFunction.getBody();
		return body.contains(location.getAddress());
	}
A variable used to restrict open-ended operations, like expanding all nodes or filtering.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/calltree/CallTreeProvider.java