const encoding/json/internal/jsonflags.RejectUnknownMembers

4 uses

	encoding/json/internal/jsonflags (current package)
		flags.go#L130: 	RejectUnknownMembers      // unmarshal only

	encoding/json/v2
		arshal_default.go#L1343: 						if uo.Flags.Get(jsonflags.RejectUnknownMembers) && fields.embeddedFallback == nil {
		options.go#L239: 		return jsonflags.RejectUnknownMembers | 1
		options.go#L241: 		return jsonflags.RejectUnknownMembers | 0