text: public LazyAreaEval getColumn(int columnIndex) {if (columnIndex >= getWidth()) {throw new IllegalArgumentException("Invalid columnIndex " + columnIndex+ ".  Allowable range is (0.." + getWidth() + ").");}int absColIx = getFirstColumn() + columnIndex;return new LazyAreaEval(getFirstRow(), absColIx, getLastRow(), absColIx, _evaluator);}