CrudKit\Data\SQLDataProvider::setPrimaryColumn PHP Method

    public function setPrimaryColumn($id, $expr)
    {
        $this->internalAddColumn(SQLColumn::CATEGORY_PRIMARY, $id, array('name' => "Primary", 'expr' => $expr));
        $this->primary_col = $id;
    }

 /**
  * @param $id
  * @param $primaryColumn
  * @return $this
  */
 public function setPrimaryColumnWithId($id, $primaryColumn)
 {
     $this->sqlProvider->setPrimaryColumn($id, $primaryColumn);
     return $this;
 }