Flow maybe types state; > Maybe types accept the provided type as well as null or undefined. So ?number would mean number, null, or undefined. So in this case, explicitly allow the type, null, or undefined in the typescript definition. Fixes #10403
@babel/types
Babel Types is a Lodash-esque utility library for AST nodes
See our website @babel/types for more information or the issues associated with this package.
Install
Using npm:
npm install --save-dev @babel/types
or using yarn:
yarn add @babel/types --dev