/**
* Add column
* @param Column $column
* @param int $position
* @return Columns
*/
public function addColumn(Column $column, $position = 0)
{
$column->setSecurityContext($this->securityContext);
if ($position > 0) {
$position--;
$head = array_slice($this->columns, 0, $position);
$tail = array_slice($this->columns, $position);
$this->columns = array_merge($head, array($column), $tail);
} else {
$this->columns[] = $column;
}
return $this;
}
