{"ast_node_type":"import","tokens":[{"end":96,"kind":"keyword","start":0,"text":"///"}]}
/// Given some where clause like `for<'b, 'c> <Self as Trait<'a_identity>>::Gat<'b>: Bound<'c>`,
/// the mapping will map `'b` back to the GAT's `'b_identity`. Then we need to compress the