https://docs.microsoft.com/en-us/dotnet/api/system.text.json.serialization.metadata.jsonobjectinfovalues-1.serializehandler?view=net-10.0
JsonObjectInfoValuesT.SerializeHandler Property (System.Text.Json.Serialization.Metadata) |...
Gets or sets a serialization implementation for instances of the class or struct that assumes options specified by JsonSourceGenerationOptionsAttribute.
property systemjson serializationtextmetadata