syntax_data: {"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"self.cause(ObligationCauseCode::WellFormed(None)),"}]}
source_snippet:                 self.cause(ObligationCauseCode::WellFormed(None)),
context_before:                 data,
context_after:                 self.recursion_depth,