100644 blob 75107ba248720527034fd652821d840b7844bd9c	checks.dart
100644 blob aa11bcfa5f2a0f87b4b8778320ccad0dbf19d8c8	collection_equality.dart
100644 blob c0c356082b835f26e89c0043be3e30ab9ec5c2cb	describe.dart
040000 tree d4a52cde48c87c2818c376c5b3da3696815189eb	extensions