Grid/Grid.php
public function getColumn($columnId)
    {
        foreach ($this->lazyAddColumn as $column) {
            if ($column['column']->getId() == $columnId) {
                return $column['column'];
            }
        }

        return $this->columns->getColumnById($columnId);
    }
public function getColumn($columnId)
    {
        foreach ($this->lazyAddColumn as $column) {
            if ($column['column']->getId() == $columnId) {
                return $column['column'];
            }
        }

        return $this->columns->getColumnById($columnId);
    }
Get a column by its identifier.

@param $columnId

@return Column