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-Immutable ![release](https://img.shields.io/github/release/benbjohnson/immutable.svg?style=flat-square) ![CircleCI](https://img.shields.io/circleci/project/github/benbjohnson/immutable/master.svg?style=flat-square) ![license](https://img.shields.io/github/license/benbjohnson/immutable.svg?style=flat-square)
+Immutable ![release](https://img.shields.io/github/release/benbjohnson/immutable.svg?style=flat-square) ![CircleCI](https://img.shields.io/circleci/project/github/benbjohnson/immutable/master.svg?style=flat-square) ![coverage](https://img.shields.io/codecov/c/github/benbjohnson/immutable/master.svg?style=flat-square) ![license](https://img.shields.io/github/license/benbjohnson/immutable.svg?style=flat-square)
 =========
 
 This repository contains immutable collection types for Go. It includes