def by_base_site_page_id(self,base_site_page_id: str) -> BaseSitePageItemRequestBuilder:
        """
        Provides operations to manage the pages property of the microsoft.graph.site entity.
        param base_site_page_id: The unique identifier of baseSitePage
        Returns: BaseSitePageItemRequestBuilder
        """
        if base_site_page_id is None:
            raise TypeError("base_site_page_id cannot be null.")
        from .item.base_site_page_item_request_builder import BaseSitePageItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["baseSitePage%2Did"] = base_site_page_id
        return BaseSitePageItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the pages property of the microsoft.graph.site entity.
        param base_site_page_id: The unique identifier of baseSitePage
        Returns: BaseSitePageItemRequestBuilder
        
msgraph/generated/sites/item/pages/pages_request_builder.py