What is equivalent class for zuul 1.x RequestContext class in zuul 2.x?

[DeepakChhetri1986]

Could you please share the replacement class for RequestContext class in Zuul 2.x version?
We are using RequestContext class heavily to get request metadata and sharing data among filters and add custom headers in zuulRequestHeaders map.
As part of Zuul 2.x upgrade we need to replace with equivalent class to resolve compilation error and get same functionality for filters.