{"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"///"}]}
/// Implemented as a custom trait rather than `From` so that it is implemented on the type being
/// Converts a value of a type into a `DiagArg` (typically a field of an `Diag` struct).
/// converted rather than on `DiagArgValue`, which enables types from other `rustc_*` crates to