Returns the index of row where the tile with tileIndex is placed.
Remarks
Some documents (spreadsheets, for example) are not possible to render a page as a single image. For those documents a page is rendered as a set of tiles. These tiles are placed in the rectangular table.
RowCount and ColumnCount represent the total number of rows and columns of this table. If document page is rendered to the single image these properties are equal to 1.