private void buildPanels() {
		removeAll();
		add(buildLeftComponent(), BorderLayout.WEST);
		add(scroller, BorderLayout.CENTER);
		add(taskMonitorComponent, BorderLayout.SOUTH);
	}
Get the line number for the given y position, relative to the scroll panel

<p>
If the y position is below all the lines, the last line is returned.

@param y the y position
@return the line number, or 0 if not applicable
Ghidra/Features/Decompiler/src/main/java/ghidra/app/decompiler/component/DecompilerPanel.java