Sets or retrieves the height of the grid row.
var value = obj.getRowHeight();
obj.setRowHeight(value);
obj.onRowHeightChanging = function(value){...};
obj.onRowHeightChanged = function(value){...};
obj.onRowHeightError = function(value){...};
obj.setRowHeight(30); // set height of all rows to 30px
Currently the grid requires the same height for all rows.
Row model: count, indices, position, offset, selected, state