syntax_data: {"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"LayoutError::SizeOverflow(..)"}]}
source_snippet:                 LayoutError::SizeOverflow(..) => Self::SizeOverflow,
context_before:                 | LayoutError::NormalizationFailure(..) => Self::UnknownLayout,
context_after:                 LayoutError::Cycle(err) => Self::TypeError(*err),