Enum FieldPresence Path C++ Link Google.Protobuf.Reflection.FeatureSet.Types.FieldPresence, Google.Protobuf underlying int32 Google.Protobuf.dll Values 4 NameValueHex Unknown00x00Explicit10x01Implicit20x02LegacyRequired30x03 Used by 2types with a member, parameter or interface of this type FeatureSetFeatureSetDescriptor // Google.Protobuf.Reflection.FeatureSet.Types.FieldPresence, Google.Protobuf enum class FieldPresence : int32 { Unknown = 0, Explicit = 1, Implicit = 2, LegacyRequired = 3, };