syntax_data: {"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"MalformedForSourcemap(MalformedSourceMapPositions),"}]}
source_snippet:     MalformedForSourcemap(MalformedSourceMapPositions),
context_before:     DistinctSources(Box<DistinctSources>),
context_after:     SourceNotAvailable { filename: FileName },