public boolean isVisible(int modelIndex) {
		TableColumn tableColumn = getColumnFromModelIndex(modelIndex);
		return isVisible(tableColumn);
	}
Returns true if the column at the given index is visible.  This call is handy when
checking for visibility when dealing with model data that knows nothing about the
hidden columns.

@param modelIndex The column index for which to check visibility.  This is the model's
                  index and <b>not the table's index</b>.
@return true if the given column is visible.
Ghidra/Framework/Docking/src/main/java/docking/widgets/table/GTableColumnModel.java