syntax_data: {"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"|"}]}
source_snippet:             | (FloatVarValue::Known(known), FloatVarValue::Unknown) => {
context_before:             (FloatVarValue::Unknown, FloatVarValue::Known(known))
context_after:                 Ok(FloatVarValue::Known(known))