@Override
	protected boolean isSizeEditable() {
		return !isPackingEnabled();
	}
Returns an attribute value for the cell at <I>columnIndex</I>
and <I>rowIndex</I>.

@param	rowIndex	the row whose value is to be looked up
@param	columnIndex 	the column whose value is to be looked up
@return	the value Object at the specified cell
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/compositeeditor/StructureEditorModel.java