@Override
	public String toString() {
		StringBuilder buffer = new StringBuilder();
		buffer.append(getClass().getSimpleName());
		buffer.append('[');
		if (mRow % 2 == 1 || mColumn % 2 == 1) {
			buffer.append('g');
		}
		buffer.append(formatRowColumn(mRow / 2, mColumn / 2, false));
		if (mRowSpan > 1 || mColumnSpan > 1) {
			buffer.append(", span "); //$NON-NLS-1$
			buffer.append(formatRowColumn(getNonGapRowSpan(), getNonGapColumnSpan(), true));
		}
		buffer.append(']');
		return buffer.toString();
	}