syntax_data: {"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // never having two copies of the data in memory at once. This is an optimization
context_before:     // read_binary_file tries to read the contents of a file into an Arc<[u8]> while
context_after:     // to support include_bytes! with large files. But since Rust allocators are