Method headers

mock/src/main/java/feign/mock/RequestKey.java:48–52

(Map<String, Collection<String>> headers)

    }

    @Deprecated
    public Builder headers(Map<String, Collection<String>> headers) {
      this.headers = RequestHeaders.of(headers);
      return this;
    }

    public Builder headers(RequestHeaders headers) {
      this.headers = headers;