src/RocknRoot/StrayFw/Database/Postgres/Query/Insert.php
public function returning($returning)
    {
        if (is_array($returning) === true) {
            $this->returning = implode(', ', $returning);
        } else {
            $this->returning = $returning;
        }

        return $this;
    }
public function returning($returning)
    {
        if (is_array($returning) === true) {
            $this->returning = implode(', ', $returning);
        } else {
            $this->returning = $returning;
        }

        return $this;
    }
Set returning clause.

@param  array|string $returning returning clause
@return Insert       this