public void addAtPoint(Point p, DataType dt) {
		endFieldEditing(); // Make sure a field isn't being edited.

		int currentIndex = table.rowAtPoint(p);
		try {
			model.add(currentIndex, dt);
		}
		catch (UsrException e) {
			model.setStatus(e.getMessage(), true);
		}
		provider.contextChanged();
	}
Add the object to the droppable component. The DragSrcAdapter calls this method from its
drop() method.

@param p the point of insert
@param dt the data type to insert
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/compositeeditor/CompositeEditorPanel.java