src/Datagrid.php
public function getColumn(string $name): ColumnInterface
    {
        if (!isset($this->columns[$name])) {
            throw new UnknownColumnException($name, $this);
        }

        return $this->columns[$name];
    }
public function getColumn(string $name): ColumnInterface
    {
        if (!isset($this->columns[$name])) {
            throw new UnknownColumnException($name, $this);
        }

        return $this->columns[$name];
    }
{@inheritdoc}