Function isNodeJsDeclaration

src/parser-utils.ts:200–204

(decl: ts.Declaration)

 * Return whether the declaration comes from Node.js.
 */
export function isNodeJsDeclaration(decl: ts.Declaration): boolean {
  const sourceFile = decl.getSourceFile();
  return sourceFile.isDeclarationFile &&
         sourceFile.fileName.includes('/node_modules/@types/node/');
}

/**
 * Return whether it is a top-level variable declaration.