pub fn read_layout_from_initial(
initial_read: &InitialRead,
layout_serde: &LayoutDeserializer,
scan: Scan,
message_cache: RelativeLayoutCache,
) -> VortexResult<Box<dyn LayoutReader>>pub fn read_layout_from_initial(
initial_read: &InitialRead,
layout_serde: &LayoutDeserializer,
scan: Scan,
message_cache: RelativeLayoutCache,
) -> VortexResult<Box<dyn LayoutReader>>