syntax_data: {"ast_node_type":"other","tokens":[{"end":23,"kind":"keyword","start":0,"text":"ShadowedEnvProbing,"}]}
source_snippet:     ShadowedEnvProbing,
context_before:     /// Looking for param-env candidates that satisfy the trait ref for a projection.
context_after:     /// Try to unify an opaque type with an existing key in the storage.