Creating a Schema Transform for a Specific Key's Type

export const ModelIdentifier = Schema.Union(
  OpenAiModelIdentifier,
  AnthropicModelIdentifier,
);
export type ModelIdentifier = typeof ModelIdentifier.Type;

export type ModelProvider = ModelIdentifier["provider"];
// Is there a way to get a ModelProvider Schema?

type ModelIdentifier = OpenAiModelIdentifier | AnthropicModelIdentifier
type ModelProvider = "openai" | "anthropic"