@Override
    public void actionPerformed(ActionContext context) {
    	panel.setTabLock( true );
		loc.getModel().addRow(loc.getRow());
		panel.getHeaderTab().update();
    }
Action class that inserts a new row into a FieldModel.
Ghidra/Features/Base/src/main/java/ghidra/app/util/viewer/format/actions/InsertRowAction.java