The area in which displays data row and cells.
It contains several Style Set properties used in drawing data row and data cells. In particular, it draw the data cell by combining style set of multiple layers including Style Set of column in which is included itself. It draws the data row before drawing the included data cells, and uses style properties set in rowStyles or rowRangeStyles.
Since this object is created internally when initializing grid, the developer does not need to directly create it. It is visited by GridBase.body property.