Trying a first version.

node_modules/undici/docs/api/DispatchInterceptor.md

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+# Interface: DispatchInterceptor
+
+Extends: `Function`
+
+A function that can be applied to the `Dispatcher.Dispatch` function before it is invoked with a dispatch request.
+
+This allows one to write logic to intercept both the outgoing request, and the incoming response.
+
+### Parameter: `Dispatcher.Dispatch`
+
+The base dispatch function you are decorating.
+
+### ReturnType: `Dispatcher.Dispatch`
+
+A dispatch function that has been altered to provide additional logic
+
+### Basic Example
+
+Here is an example of an interceptor being used to provide a JWT bearer token
+
+```js
+'use strict'
+
+const insertHeaderInterceptor = dispatch => {
+  return function InterceptedDispatch(opts, handler){
+    opts.headers.push('Authorization', 'Bearer [Some token]')
+    return dispatch(opts, handler)
+  }
+}
+
+const client = new Client('https://localhost:3000', {
+  interceptors: { Client: [insertHeaderInterceptor] }
+})
+
+```
+
+### Basic Example 2
+
+Here is a contrived example of an interceptor stripping the headers from a response.
+
+```js
+'use strict'
+
+const clearHeadersInterceptor = dispatch => {
+  const { DecoratorHandler } = require('undici')
+  class ResultInterceptor extends DecoratorHandler {
+    onHeaders (statusCode, headers, resume) {
+      return super.onHeaders(statusCode, [], resume)
+    }
+  }
+  return function InterceptedDispatch(opts, handler){
+    return dispatch(opts, new ResultInterceptor(handler))
+  }
+}
+
+const client = new Client('https://localhost:3000', {
+  interceptors: { Client: [clearHeadersInterceptor] }
+})
+
+```