MiGLayout will not expand JPanel down

Question

As I am sure some of you are aware, I am attempting to make an alernative tool to Tiled that is open source. I asked before what layout I should use and I was suggest the MiGLay

Answer 1

Needed to set the sidebar and map area in the area by using the docking feature.

For example I did as follows:

this.setLayout(new MigLayout(
    "fill",  // Layout
    "",         // Column
    ""));       // Row
this.add(map, "width 400:600:, dock center, growy");
this.add(sideBar, "width 250:300:350, dock east, growy");

This got rid of gaps and expanded everything as needed.