e.g. ```yaml requestBody: content: application/json: schema: $ref: '#/components/schemas/foo-bar-baz' ``` The generate API files have code like this: ```javascript module.exports.do_foo = function do_foo (req, res, next) { var foo-bar-baz = req.swagger.params['foo-bar-baz'].value; // ... } ``` `-` is not a valid identifier character in JavaScript, because it's used as a mathematic operator `foo - bar - baz`. The identifier is also used in the generated impl/API service: ```javascript exports.do_foo = function(foo-bar-baz) { // ... } ```