> I validate an object manually and I still have to do an "any" cast in Flow because Flow does not recognize that my `if` statement secures the type. Try this

> I validate an object manually and I still have to do an "any" cast in Flow because Flow does not recognize that my `if` statement secures the type. Try this instead: import { reify } from 'flow-runtime' import type { Type } from 'flow-runtime' type YourData = { ... } const unknownObject: mixed = ... const validatedObject: YourTarget = (reify: Type<YourData>).assert(unknownObject) See https://github.com/codemix/flow-runtime/issues/150 https://github.com/codemix/flow-runtime/issues/150 and https://codemix.github.io/flow-runtime/#/docs/type-refinements https://codemix.github.io/flow-runtime/#/docs/type-refinemen... The `reify` marker from flow-runtime and the accompanying Babel plugin will produce a runtime type object that can validate your data at runtime according to your Flow types.