Babel helper module for babel transforms authors to check the AST against duplicated nodes.
npm install babel-check-duplicated-nodesDuplicated AST nodes often lead to obscure bugs. This module checks your AST and
throws a helpful error if you include a duplicated node in your output. It's
useful when authoring babel transforms.
This piece of code was originally written by @nicolo-ribaudo and is included in
babel's codebase.
``js``
checkDuplicatedNodes(babel, ast)