def rank_members_in(self, leaderboard_name, members_and_scores):
for member, score in grouper(<NUM_LIT:2>, members_and_scores):<EOL><INDENT>self.rank_member_in(leaderboard_name, member, score)<EOL><DEDENT>
Rank an array of members in the named leaderboard.

@param leaderboard_name [String] Name of the leaderboard.
@param members_and_scores [Array] Variable list of members and scores.