MetadataKey_PathSegmentValidationError is the validation error returned by MetadataKey_PathSegment.Validate if the designated constraints aren't met.

MetadataKeyValidationError is the validation error returned by MetadataKey.Validate if the designated constraints aren't met.

MetadataKind_ClusterValidationError is the validation error returned by MetadataKind_Cluster.Validate if the designated constraints aren't met.

MetadataKind_HostValidationError is the validation error returned by MetadataKind_Host.Validate if the designated constraints aren't met.

MetadataKind_RequestValidationError is the validation error returned by MetadataKind_Request.Validate if the designated constraints aren't met.

MetadataKind_RouteValidationError is the validation error returned by MetadataKind_Route.Validate if the designated constraints aren't met.

MetadataKindValidationError is the validation error returned by MetadataKind.Validate if the designated constraints aren't met.