syntax_data: {"ast_node_type":"function","tokens":[{"end":81,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn opaque_types_storage_num_entries(&self) -> Self::OpaqueTypeStorageEntries;
context_before:     type OpaqueTypeStorageEntries: OpaqueTypeStorageEntries;
context_after:     fn clone_opaque_types_lookup_table(