syntax_data: {"ast_node_type":"other","tokens":[{"end":29,"kind":"keyword","start":0,"text":"crate::ty::ValTree<'tcx>,"}]}
source_snippet:     crate::ty::ValTree<'tcx>,
context_before:     crate::ty::UserTypeAnnotationIndex,
context_after:     crate::ty::abstract_const::NotConstEvaluatable,