# Constants
MaxMessageSet is the maximum allowed tag number of a field in a message that uses the message set wire format.
2^29 - 1.
SpecialReservedEnd is the last tag in a range that is reserved and not allowed for use in message definitions.
SpecialReservedStart is the first tag in a range that is reserved and not allowed for use in message definitions.
# Variables
EnumName is the tag number of the name element in an enum descriptor proto.
EnumOptions is the tag number of the options element in an enum descriptor proto.
EnumReservedName is the tag number of the reserved names element in an enum descriptor proto.
EnumReservedRange is the tag number of the reserved ranges element in an enum descriptor proto.
EnumValName is the tag number of the name element in an enum value descriptor proto.
EnumValNumber is the tag number of the number element in an enum value descriptor proto.
EnumValOptions is the tag number of the options element in an enum value descriptor proto.
EnumValues is the tag number of the values element in an enum descriptor proto.
ExtensionRangeEnd is the tag number of the end index in an extension range proto.
ExtensionRangeOptions is the tag number of the options element in an extension range proto.
ExtensionRangeStart is the tag number of the start index in an extension range proto.
FieldDefault is the tag number of the default value element in a field descriptor proto.
FieldExtendee is the tag number of the extendee element in a field descriptor proto.
FieldJsonName is the tag number of the JSON name element in a field descriptor proto.
FieldLabel is the tag number of the label element in a field descriptor proto.
FieldName is the tag number of the name element in a field descriptor proto.
FieldNumber is the tag number of the number element in a field descriptor proto.
FieldOptions is the tag number of the options element in a field descriptor proto.
FieldProto3Optional is the tag number of the proto3_optional element in a descriptor proto.
FieldType is the tag number of the type element in a field descriptor proto.
FieldTypeName is the tag number of the type name element in a field descriptor proto.
FileDependency is the tag number of the dependencies element in a file descriptor proto.
FileEnumType is the tag number of the enums element in a file descriptor proto.
FileExtensions is the tag number of the extensions element in a file descriptor proto.
FileMessageType is the tag number of the messages element in a file descriptor proto.
FileOptions is the tag number of the options element in a file descriptor proto.
FilePackage is the tag number of the package element in a file descriptor proto.
FileServices is the tag number of the services element in a file descriptor proto.
FileSyntax is the tag number of the syntax element in a file descriptor proto.
MessageEnums is the tag number of the enums element in a message descriptor proto.
MessageExtensionRange is the tag number of the extension ranges element in a message descriptor proto.
MessageExtensions is the tag number of the extensions element in a message descriptor proto.
MessageFields is the tag number of the fields element in a message descriptor proto.
MessageName is the tag number of the name element in a message descriptor proto.
MessageNestedMessages is the tag number of the nested messages element in a message descriptor proto.
MessageOneOfs is the tag number of the one-ofs element in a message descriptor proto.
MessageOptions is the tag number of the options element in a message descriptor proto.
MessageReservedName is the tag number of the reserved names element in a message descriptor proto.
MessageReservedRange is the tag number of the reserved ranges element in a message descriptor proto.
MethodInput is the tag number of the input type element in a method descriptor proto.
MethodInputStream is the tag number of the input stream flag in a method descriptor proto.
MethodName is the tag number of the name element in a method descriptor proto.
MethodOptions is the tag number of the options element in a method descriptor proto.
MethodOutput is the tag number of the output type element in a method descriptor proto.
MethodOutputStream is the tag number of the output stream flag in a method descriptor proto.
OneofNameTag is the tag number of the name element in a one-of descriptor proto.
OneofOptionsTag is the tag number of the options element in a one-of descriptor proto.
ReservedRangeEnd is the tag number of the end index in a reserved range proto.
ReservedRangeStart is the tag number of the start index in a reserved range proto.
ServiceMethods is the tag number of the methods element in a service descriptor proto.
ServiceName is the tag number of the name element in a service descriptor proto.
ServiceOptions is the tag number of the options element in a service descriptor proto.
UninterpretedAggregate is the tag number of the aggregate value in an uninterpreted options proto.
UninterpretedDouble is the tag number of the double value in an uninterpreted options proto.
UninterpretedIdent is the tag number of the identifier value in an uninterpreted options proto.
UninterpretedName is the tag number of the name element in an uninterpreted options proto.
UninterpretedNameIsExtension is the tag number of the name element in an uninterpreted option name proto.
UninterpretedNameName is the tag number of the name element in an uninterpreted option name proto.
UninterpretedNegInt is the tag number of the negative int value in an uninterpreted options proto.
UninterpretedOptions is the tag number of the uninterpreted options element.
UninterpretedPosInt is the tag number of the positive int value in an uninterpreted options proto.
UninterpretedString is the tag number of the string value in an uninterpreted options proto.