Enumerable Map Upgradeable

Library for managing an enumerable variant of Solidity's https://solidity.readthedocs.io/en/latest/types.html#mapping-types[mapping] type. Maps have the following properties: - Entries are added, removed, and checked for existence in constant time (O(1)). - Entries are enumerated in O(n). No guarantees are made on the ordering. contract Example { // Add the library methods using EnumerableMap for EnumerableMap.UintToAddressMap; // Declare a set state variable EnumerableMap.UintToAddressMap private myMap; } As of v3.0.0, only maps of type uint256 -> address (UintToAddressMap) are supported.