@Override
	public Icon getNavigatableIcon() {
		// Just use the CodeViewer's navigatable icon.
		return navigatable.getNavigatableIcon();
	}
The navigatable for the Diff.
<p>
The CodeViewerService provides Diff with a listing, so where appropriate this navigatable
will defer to the CodeViewerService navigatable.

@param diffPlugin the plugin for the Diff which can be used to obtain needed info.
@param navigatable navigatable that the CodeViewerService provides.
Ghidra/Features/ProgramDiff/src/main/java/ghidra/app/plugin/core/diff/DiffNavigatable.java