Backbone.sync URL customization for method-specific endpoints

Backbone.js utilizes Backbone.sync to manage RESTful requests, typically relying on a model's urlRoot or url() method to determine the target endpoint. While this works for standard CRUD operations, certain API architectures require different base URLs or path structures depending on whether the operation is a read, create, update, or delete.

Currently, the default Backbone.sync implementation does not provide a native configuration option to map specific HTTP methods to distinct URL patterns without overriding the global sync function or implementing complex logic within the model's url() method.

What is the most maintainable way to implement method-specific URL routing in Backbone.js without duplicating boilerplate across multiple model definitions? Is there a documented pattern for injecting a request interceptor into the sync pipeline to modify the URL based on the operation type?