async def get(self,request_configuration: Optional[RequestConfiguration[EffectiveRulesRequestBuilderGetQueryParameters]] = None) -> Optional[UnifiedRoleManagementPolicyRuleCollectionResponse]:
        """
        The list of effective rules like approval rules and expiration rules evaluated based on inherited referenced rules. For example, if there is a tenant-wide policy to enforce enabling an approval rule, the effective rule will be to enable approval even if the policy has a rule to disable approval. Supports $expand.
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[UnifiedRoleManagementPolicyRuleCollectionResponse]
        """
        request_info = self.to_get_request_information(
            request_configuration
        )
        from .....models.o_data_errors.o_data_error import ODataError

        error_mapping: dict[str, type[ParsableFactory]] = {
            "XXX": ODataError,
        }
        if not self.request_adapter:
            raise Exception("Http core is null") 
        from .....models.unified_role_management_policy_rule_collection_response import UnifiedRoleManagementPolicyRuleCollectionResponse

        return await self.request_adapter.send_async(request_info, UnifiedRoleManagementPolicyRuleCollectionResponse, error_mapping)

        The list of effective rules like approval rules and expiration rules evaluated based on inherited referenced rules. For example, if there is a tenant-wide policy to enforce enabling an approval rule, the effective rule will be to enable approval even if the policy has a rule to disable approval. Supports $expand.
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[UnifiedRoleManagementPolicyRuleCollectionResponse]
        
msgraph/generated/policies/role_management_policies/item/effective_rules/effective_rules_request_builder.py