@Override
 public Iterator<UniquenessConstraint> constraintsGetForLabel(KernelStatement state, int labelId) {
   state.locks().acquireShared(ResourceTypes.SCHEMA, schemaResource());
   return schemaReadDelegate.constraintsGetForLabel(state, labelId);
 }
 @Override
 public Iterator<UniquenessConstraint> constraintsGetForLabel(KernelStatement state, int labelId) {
   state.locks().acquireSchemaReadLock();
   return schemaReadDelegate.constraintsGetForLabel(state, labelId);
 }