syntax_data: {"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"for"}]}
source_snippet:     for (variant_mpi, variant_path) in enum_path.children(&move_data.move_paths) {
context_before:     let enum_path = &move_data.move_paths[enum_mpi];
context_after:         // Because of the way we build the `MoveData` tree, each child should have exactly one more