def by_subcategory_template_id(self,subcategory_template_id: str) -> SubcategoryTemplateItemRequestBuilder:
        """
        Provides operations to manage the subcategories property of the microsoft.graph.security.categoryTemplate entity.
        param subcategory_template_id: The unique identifier of subcategoryTemplate
        Returns: SubcategoryTemplateItemRequestBuilder
        """
        if subcategory_template_id is None:
            raise TypeError("subcategory_template_id cannot be null.")
        from .item.subcategory_template_item_request_builder import SubcategoryTemplateItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["subcategoryTemplate%2Did"] = subcategory_template_id
        return SubcategoryTemplateItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the subcategories property of the microsoft.graph.security.categoryTemplate entity.
        param subcategory_template_id: The unique identifier of subcategoryTemplate
        Returns: SubcategoryTemplateItemRequestBuilder
        
msgraph/generated/security/labels/categories/item/subcategories/subcategories_request_builder.py