syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"f0,"}]}
source_snippet:                     f0, f1, f2, f3, f4, f5, f6, f7,
context_before:                     // f0-f13
context_after:                     f8, f9, f10, f11, f12, f13,