src/Walker.php
public function begin()
    {
        $this->index = 0;
        $this->infiniteIndex++;

        if ($this->classesOnly) {
            return $this->grid->getColumnAsString($this->index);
        }

        return sprintf(
            '%s%s%s<div class="%s">%s',
            $this->beginRow(),
            PHP_EOL,
            $this->grid->getColumnResetsAsString($this->index),
            $this->grid->getColumnAsString($this->index),
            PHP_EOL
        );
    }
public function begin()
    {
        $this->index = 0;
        $this->infiniteIndex++;

        if ($this->classesOnly) {
            return $this->grid->getColumnAsString($this->index);
        }

        return sprintf(
            '%s%s%s<div class="%s">%s',
            $this->beginRow(),
            PHP_EOL,
            $this->grid->getColumnResetsAsString($this->index),
            $this->grid->getColumnAsString($this->index),
            PHP_EOL
        );
    }
Start a new row.

If classesOnly is set, only the first column is returned.

@return string