Type Alias Barrier 

pub type Barrier = TrailingSetTopicAsId<(TakeWeightCredit, AllowKnownQueryResponses<XcmPallet>, WithComputedOrigin<(AllowTopLevelPaidExecutionFrom<Everything>, AllowExplicitUnpaidExecutionFrom<IsChildSystemParachain<Id>>, AllowSubscriptionsFrom<OnlyParachains>), UniversalLocation, ConstU32<8>>)>;

The barriers one of which must be passed for an XCM message to be executed.

Aliased Type

pub struct Barrier(/* private fields */);