FieldOptions wraps environment variable metadata. This wrapper pattern allows attaching environment variable metadata to protobuf fields without symbol conflicts (multiple extensions can define different message types without collision).
Use with google.protobuf.FieldOptions extension (see below).
Summary
Types
@type t() :: %TrogonProto.Env.V1Alpha1.FieldOptions{ __unknown_fields__: [Protobuf.unknown_field()], env_var: TrogonProto.Env.V1Alpha1.EnvVarOption.t() | nil }