syntax_data: {"ast_node_type":"function","tokens":[{"end":46,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn llvm_blake3_hasher_init_derive_key(
context_before:     pub fn llvm_blake3_hasher_init_keyed(hasher: *mut llvm_blake3_hasher, key: *const u8);
context_after:         hasher: *mut llvm_blake3_hasher,