onLoadTopMsgs property
When jump to top, library will detect whether the hasPrevMsgs is true, If the value is true, invoke onLoadTopMsgs to load first screen messages
Implementation
final Future Function()? onLoadTopMsgs;
When jump to top, library will detect whether the hasPrevMsgs is true, If the value is true, invoke onLoadTopMsgs to load first screen messages
final Future Function()? onLoadTopMsgs;