Function apply_patch_chain 

pub fn apply_patch_chain<F>(
    patches: &[Patch],
    get_payload_blob: F,
) -> Result<FileTree, ApplyError>
where
    F: FnMut(&Patch) -> Option<Hash>,

Apply a chain of patches (from oldest to newest) to produce a final FileTree.

The patches should be in application order (root first, tip last). This function applies each patch sequentially, threading the FileTree through each transformation.

Arguments

• patches - Ordered list of patches to apply (oldest first)
• get_payload_blob - Function to resolve patch payload to CAS hash