Function parse_schema_bundle 

pub fn parse_schema_bundle(
    protocol: &str,
    docs: &[Value],
) -> Result<Schema, ProtocolError>

Parse a bundle of schema documents into one Schema, resolving cross-document references across the whole bundle.

A single-document parser sees one document at a time, so a reference into another document resolves to an opaque placeholder vertex carrying no fields, and a lens has nothing typed to bind to. Passing the referenced documents alongside the referring one resolves each such reference to the definition’s real, typed vertex. A reference whose target is in no document of the bundle stays a placeholder, which is what marks it as genuinely external.

This is the protocol-dispatching entry point the generic crates call, so that protocol names stay inside this crate. A protocol gains bundle support by adding an arm here; no binding surface changes.

Errors

Returns ProtocolError::Parse if no bundle parser is registered for protocol, or the protocol’s own error if the documents are not a well-formed bundle for it.