def by_subdomain_id(self,subdomain_id: str) -> SubdomainItemRequestBuilder:
        """
        Provides operations to manage the subdomains property of the microsoft.graph.security.threatIntelligence entity.
        param subdomain_id: The unique identifier of subdomain
        Returns: SubdomainItemRequestBuilder
        """
        if subdomain_id is None:
            raise TypeError("subdomain_id cannot be null.")
        from .item.subdomain_item_request_builder import SubdomainItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["subdomain%2Did"] = subdomain_id
        return SubdomainItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the subdomains property of the microsoft.graph.security.threatIntelligence entity.
        param subdomain_id: The unique identifier of subdomain
        Returns: SubdomainItemRequestBuilder
        
msgraph/generated/security/threat_intelligence/subdomains/subdomains_request_builder.py