syntax_data: {"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // "master bound" that *implies* that bounds from other traits are
context_before:         // user specifies a region bound (`'c`, in this case) it is the
context_after:         // all met. (Remember that *all bounds* in a type like