Dart语言和Flutter框架的monad。用于错误处理和面向铁路的编程的库。支持`Monad co...，
Either monad for Dart language and Flutter framework. The library for error handling and railway oriented programming. Supports `Monad comprehensions` (both `sync` and `async` versions). Supports `async map` and `async flatMap` hiding the boilerplate of working with asynchronous computations `Future