class Left extends EitherAbstract<T>import { Left } from "https://deno.land/x/careful@v0.1.0/mod.ts"; The Left class represents the left side of Either class which by convention is a "failure". Examplesconst either = left(new Error("Something went wrong!")); Type ParametersTMethodsafmL<NT>(cb: (v: T) => Promise<EitherAbstract<NT>>)afmR()amL<NT>(cb: (v: T) => Promise<NT>)amR<NT>()fmL<NT>(cb: (v: T) => EitherAbstract<NT>)fmR()mL<NT>(cb: (v: T) => NT)mR()