@Override
	protected Object[] createColumnHeaders() {

		Object[] colsNames = new Object[numColumns];
		colsNames[numColumns - 1] = HEADER_COL_PREVIEW;

		return colsNames;
	}
Constructs the preview strings to display in the table, based on the
current mask settings.
<p>
This is a potentially long-running task so it's implemented in a
background task. Also, note that we need to specify the dialog parent so
we can't use the convenience TaskLauncher.launch... methods.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/instructionsearch/ui/PreviewTable.java