lib/SteamCondenser/Community/SteamGroup.php
public function getMemberCount() {
        if(empty($this->memberCount)) {
            $totalPages = $this->fetchPage(1);
            if($totalPages == 1) {
                $this->fetchTime = time();
            }
        }

        return $this->memberCount;
    }
public function getMemberCount() {
        if(empty($this->memberCount)) {
            $totalPages = $this->fetchPage(1);
            if($totalPages == 1) {
                $this->fetchTime = time();
            }
        }

        return $this->memberCount;
    }
Returns the number of members this group has

If the members have already been fetched the size of the member array is
returned. Otherwise the group size is separately fetched without needing
multiple requests for big groups.

@return int The number of this group's members
@see fetchPage()