@Override
	public MarkerLocation getMarkerLocation(int x, int y) {
		Address addr = getAddress(y);
		if (addr == null) {
			return null;
		}
		MarkerSet marker = markerManager.getMarkerSet(program, addr);
		return new MarkerLocation(marker, program, addr, x, y);
	}
The provider which renders the marker margin, usually placed to the left of listing
{@link FieldPanel}s.

<p>
These are managed by a {@link MarkerManager}. Obtain one via
{@link MarkerService#createMarginProvider()}.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/marker/MarkerMarginProvider.java