// to call `rewriter::replaceOpWihNewOp`, which is not a const member function.
template <typename MatrixDiagV2OrV3Op>
bool ConvertTFMatrixDiagV2orV3(Operation* op, PatternRewriter* rewriter) {
  auto tf_matrix_diag_v2_or_v3_op = cast<MatrixDiagV2OrV3Op>(op);

  if (tf_matrix_diag_v2_or_v3_op.getNumOperands() != 5) return false;

  auto input = tf_matrix_diag_v2_or_v3_op.getDiagonal();