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# Source code for langchain_core.chat_loaders

    from abc import ABC, abstractmethod
    from typing import Iterator, List

    from langchain_core.chat_sessions import ChatSession

    class BaseChatLoader(ABC):
        """Base class for chat loaders."""

        @abstractmethod
        def lazy_load(self) -> Iterator[ChatSession]:
            """Lazy load the chat sessions."""

        def load(self) -> List[ChatSession]:
            """Eagerly load the chat sessions into memory."""
            return list(self.lazy_load())