syntax_data: {"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":".predicates_of(impl_data.impl_def_id)"}]}
source_snippet:                     .predicates_of(impl_data.impl_def_id)
context_before:                 let predicates = tcx
context_after:                     .instantiate(tcx, impl_data.args)