syntax_data: {"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"Self::F16"}]}
source_snippet:             Self::F16 => f.write_str("f16"),
context_before:             Self::I128 => f.write_str("i128"),
context_after:             Self::F32 => f.write_str("f32"),