syntax_data: {"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"///"}]}
source_snippet: /// And `target_node` is the impl/trait we're actually going to get the
context_before: /// selected, and `source_args` is its generic parameters.
context_after: /// definition from. The resulting instantiation will map from `target_node`'s