https://hc.apache.org/httpcomponents-core-5.4.x/current/httpcore5/apidocs/org/apache/hc/core5/concurrent/FutureCallback.html
FutureCallback (Apache HttpComponents Core HTTP/1.1 5.4.2 API)
apache httpcomponentscoreapi
https://pub.dev/documentation/loadmore/latest/loadmore/FutureCallBack.html
FutureCallBack typedef - loadmore library - Dart API
API docs for the FutureCallBack typedef from the loadmore library, for the Dart programming language.
typedefloadmorelibrarydartapi