{"ast_node_type":"import","tokens":[{"end":83,"kind":"keyword","start":0,"text":"//"}]}
        // which means that we can use crate B's serialized source map information.
        // 1. The span references a file from crate B. This makes it a 'local' span,
        // 2. The span references a file from crate C. This makes it a 'foreign' span,