Module virtual_view 

VirtualView lifecycle management for layout

This module provides:

• VirtualView re-invocation logic for lazy loading
• WebRender PipelineId tracking
• Nested DOM ID management

Structs

EdgeFlags

Flags indicating which scroll edges have been triggered

VirtualViewDebugInfo

Debug info for a single VirtualView, returned by get_all_virtual_view_infos

VirtualViewManager

Manages VirtualView lifecycle, including re-invocation and PipelineId generation