syntax_data: {"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                         // in cases where the `extern crate foo` has non-trivial
context_before:                         // the `print_def_path` call, to avoid infinite recursion
context_after:                         // parents, e.g. it's nested in `impl foo::Trait for Bar`