code: public void setSelectedRow(java.lang.Object _selectedRow) {
  		getStateHelper().put(PropertyKeys.selectedRow, _selectedRow);
  	}
docs: Optional parameter defining which rows are selected when the datatable is initially rendered. If this attribute is an integer, it's the row index. If it's a string, it's a jQuery expression. If it's another object, it's compared to the loop var.  Automatically sets selection='true' and selected-items='row'. <P>
  Usually this method is called internally by the JSF engine.