@Override
			public Component getTableCellRendererComponent(GTableCellRenderingData data) {

				JLabel label = (JLabel) super.getTableCellRendererComponent(data);
				Object value = data.getValue();

				String pathName = (String) value;

				boolean fileExists = true;
				if (pathName == null) {
					pathName = "";
				}
				else {
					int colonSlashSlash = pathName.indexOf("://");
					if (colonSlashSlash <= 0) { // Assume FSRL/URLs always exist
						fileExists = new File(pathName).exists();
					}
				}

				label.setText(pathName.toString());
				if (!fileExists) {
					label.setForeground(getErrorForegroundColor(data.isSelected()));
				}

				return label;
			}
Clear the paths in the table.
Ghidra/Framework/Docking/src/main/java/docking/widgets/pathmanager/PathnameTablePanel.java