src/Riak/Command/Builder/QueryIndex.php
public function validate()
    {
        $this->required('Bucket');
        $this->required('IndexName');

        if($this->isMatchQuery()) {
            $this->required('MatchValue');
        }
        else {
            $this->required('LowerBound');
            $this->required('UpperBound');
        }
    }
public function validate()
    {
        $this->required('Bucket');
        $this->required('IndexName');

        if($this->isMatchQuery()) {
            $this->required('MatchValue');
        }
        else {
            $this->required('LowerBound');
            $this->required('UpperBound');
        }
    }
{@inheritdoc}