{"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"DefWithBody::Function(f)"}]}
                DefWithBody::Function(f) => f.source(db).map(|src| src.syntax().cloned()),
            let def = match op.parent(db) {
                DefWithBody::Const(c) => c.source(db).map(|src| src.syntax().cloned()),