src/QueryBuilder.php
public function whereSubQuery($column, $query, $boolean = 'and')
    {
        list($type, $operator) = ['Sub', 'in'];

        $this->wheres[] = compact('type', 'column', 'operator', 'query', 'boolean');

        $this->addBinding($query->getBindings(), 'where');

        return $this;
    }
public function whereSubQuery($column, $query, $boolean = 'and')
    {
        list($type, $operator) = ['Sub', 'in'];

        $this->wheres[] = compact('type', 'column', 'operator', 'query', 'boolean');

        $this->addBinding($query->getBindings(), 'where');

        return $this;
    }
Add a full sub-select to the query.

@param string $column
@param \Illuminate\Database\Query\Builder $query
@param string $boolean
@return $this