actually, I implemented this a few commits ago
authorMatt S Trout <mst@shadowcat.co.uk>
Thu, 17 Mar 2016 17:40:37 +0000 (17:40 +0000)
committerMatt S Trout <mst@shadowcat.co.uk>
Thu, 17 Mar 2016 17:40:37 +0000 (17:40 +0000)
commita045eac5f863d0fe6606c7495329bf57e9113d69
tree287bbb9b5b1b208b2598db5489ec2298c1ee5da2
parentbe5871c67f0dca99642a4d137e9c216b368dc45a
actually, I implemented this a few commits ago
lib/DX/Predicate/MemberAt.pm