import * as t from '@babel/types';
/**
 * Whether `node` represents a user-controlled input source.
 *
 * Recognized patterns (top of expression, in any nesting level the caller
 * passes in):
 *   req.body / req.query / req.params / req.cookies / req.headers / req.url
 *   request.body / request.query / request.params / request.form
 *   ctx.request.body / ctx.request.query / ...
 *   event.body / event.queryStringParameters / event.pathParameters
 *   process.argv
 *
 * Explicitly NOT recognized (trusted):
 *   process.env.*
 */
export declare function isUserInputSource(node: t.Node): boolean;