src/Response/StreamReader.php
public function readVarint() {
        list($higher, $lower) = array_values(unpack('N2', $this->data));
        return $higher << 32 | $lower;
    }
public function readVarint() {
        list($higher, $lower) = array_values(unpack('N2', $this->data));
        return $higher << 32 | $lower;
    }
Read variable length integer.

@return string