{"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"constraints:"}]}
    constraints: &'hir [hir::AssocItemConstraint<'hir>],
    args: SmallVec<[hir::GenericArg<'hir>; 4]>,
    parenthesized: hir::GenericArgsParentheses,