{"push_id":935673933,"size":1,"distinct_size":1,"ref":"refs/heads/master","head":"44ad98aac9394e91ec36759001c4021f219ebc55","before":"53e5b23a3a2e94407efd16a13ae1a0b99498d0fa","commits":[{"sha":"44ad98aac9394e91ec36759001c4021f219ebc55","author":{"email":"74b2712074b149d140079dbd7e875955d192e617@pixelzoom.com","name":"Chris Malley"},"message":"add utilities for verifying duck typing","distinct":true,"url":"https://api.github.com/repos/phetsims/function-builder/commits/44ad98aac9394e91ec36759001c4021f219ebc55"}]}