def _get_prompt_modules(self) -> PromptMixinType:
        """
        Get prompt sub-modules.

        Return a dictionary of sub-modules within the current module
        that also implement PromptMixin (so that their prompts can also be get/set).

        Can be blank if no sub-modules.

        """

        Get prompt sub-modules.

        Return a dictionary of sub-modules within the current module
        that also implement PromptMixin (so that their prompts can also be get/set).

        Can be blank if no sub-modules.

        
llama-index-core/llama_index/core/prompts/mixin.py