node_modules/@babel/traverse/scripts/generators/asserts.js

import t from "@babel/types";

export default function generateAsserts() {
  let output = `/*
 * This file is auto-generated! Do not modify it directly.
 * To re-generate run 'make build'
 */
import * as t from "@babel/types";
import NodePath from "../index";


export interface NodePathAssetions {`;

  for (const type of [...t.TYPES].sort()) {
    output += `
  assert${type}(
    opts?: object,
  ): asserts this is NodePath<t.${type}>;`;
  }

  output += `
}`;

  return output;
}