src/org/tiefaces/components/websheet/utility/CellUtility.java
@SuppressWarnings("rawtypes")
	private static CTShape getCtShapeFromVml(final Cell sourceCell, XSSFVMLDrawing sourceVml)
			throws ReflectiveOperationException {
		Method findshape;
		// int parameter
		Class[] paramInt = new Class[2];
		paramInt[0] = Integer.TYPE;
		paramInt[1] = Integer.TYPE;
		findshape = sourceVml.getClass().getDeclaredMethod("findCommentShape", paramInt);
		findshape.setAccessible(true);
		return (CTShape) findshape.invoke(sourceVml, sourceCell.getRowIndex(), sourceCell.getColumnIndex());
	}
@SuppressWarnings("rawtypes")
	private static CTShape getCtShapeFromVml(final Cell sourceCell, XSSFVMLDrawing sourceVml)
			throws ReflectiveOperationException {
		Method findshape;
		// int parameter
		Class[] paramInt = new Class[2];
		paramInt[0] = Integer.TYPE;
		paramInt[1] = Integer.TYPE;
		findshape = sourceVml.getClass().getDeclaredMethod("findCommentShape", paramInt);
		findshape.setAccessible(true);
		return (CTShape) findshape.invoke(sourceVml, sourceCell.getRowIndex(), sourceCell.getColumnIndex());
	}
Find CtShape from vml object. This class use reflection to invoke the
protected method in POI.

@param sourceCell            cell.
@param sourceVml            vml.
@return ctShape.
@throws ReflectiveOperationException the reflective operation exception
@throws SecurityException the security exception