if (op.getNumSparse() != sparse_types_count) {
    return op.emitError() << "attribute 'num_sparse' should be the same as "
                          << "the length of attribute 'sparse_types'";
  }
  if (op.getSparseIndices().size() != sparse_types_count) {
    return op.emitError() << "output 'sparse_indices' should have same length "
                          << "as attribute 'sparse_types'";
  }