A type representing any defined Message or MessageChunk type.
AnyMessage = Annotated[Annotated[AIMessage, Tag(
tag='ai')] | Annotated[HumanMessage, Tag(tag='human')] | Annotated[ChatMessage, Tag(tag='chat')] | Annotated[SystemMessage, Tag(tag='system')] | Annotated[FunctionMessage, Tag(tag='function')] | Annotated[ToolMessage, Tag(tag='tool')] | Annotated[AIMessageChunk, Tag(tag='AIMessageChunk')] | Annotated[HumanMessageChunk, Tag(tag='HumanMessageChunk')] | Annotated[ChatMessageChunk, Tag(tag='ChatMessageChunk')] | Annotated[SystemMessageChunk, Tag(tag='SystemMessageChunk')] | Annotated[FunctionMessageChunk, Tag(tag='FunctionMessageChunk')] | Annotated[ToolMessageChunk, Tag(tag='ToolMessageChunk')], Field(discriminator=(Discriminator(_get_type))
)]