log::trace!("Applying function on all proxied shard segments");

let mut result = Ok(());

let mut unproxied_segment_ids = Vec::with_capacity(proxies.len());

proxies.reverse();

for (segment_id, proxy_segment) in &proxies {

// Get segment to snapshot

// Make sure to keep at least one proxy segment to maintain access to the points in the shared write segment.

// The last proxy and the shared write segment will be promoted into the segment_holder atomically

// by `Self::unproxy_all_segments` afterwards to maintain the read consistency.

match Self::try_unproxy_segment(segments_lock, *segment_id, proxy_segment.clone()) {

Ok(lock) => {

segments_lock = lock;