message: Increase the input dimension size from 4 to 6 to address the RetinaNet model
diff: @@ -215,7 +215,7 @@ tensorflow::Status ImportFloatArray(const TensorProto& input_tensor,
  Array* output_array) {
  CHECK_EQ(input_tensor.dtype(), DT_FLOAT);
  const auto& input_shape = input_tensor.tensor_shape();
  - CHECK_LE(input_shape.dim_size(), 4);
  + CHECK_LE(input_shape.dim_size(), 6);
  int input_flat_size;
  auto status = ImportShape(input_shape.dim(), &input_flat_size,
  output_array->mutable_shape());
  @@ -253,7 +253,7 @@ tensorflow::Status ImportQuint8Array(const TensorProto& input_tensor,
  Array* output_array) {
  CHECK_EQ(input_tensor.dtype(), DT_QUINT8);
  const auto& input_shape = input_tensor.tensor_shape();
  - CHECK_LE(input_shape.dim_size(), 4);
  + CHECK_LE(input_shape.dim_size(), 6);
  int input_flat_size;
  auto status = ImportShape(input_shape.dim(), &input_flat_size,
  output_array->mutable_shape());
  @@ -290,7 +290,7 @@ tensorflow::Status ImportInt32Array(const TensorProto& input_tensor,
  Array* output_array) {
  CHECK_EQ(input_tensor.dtype(), DT_INT32);
  const auto& input_shape = input_tensor.tensor_shape();
  - CHECK_LE(input_shape.dim_size(), 4);
  + CHECK_LE(input_shape.dim_size(), 6);
  int input_flat_size;
  auto status = ImportShape(input_shape.dim(), &input_flat_size,
  output_array->mutable_shape());
  @@ -326,7 +326,7 @@ tensorflow::Status ImportInt64Array(const TensorProto& input_tensor,
  Array* output_array) {
  CHECK_EQ(input_tensor.dtype(), DT_INT64);
  const auto& input_shape = input_tensor.tensor_shape();
  - CHECK_LE(input_shape.dim_size(), 4);
  + CHECK_LE(input_shape.dim_size(), 6);
  int input_flat_size;
  auto status = ImportShape(input_shape.dim(), &input_flat_size,
  output_array->mutable_shape());
  @@ -363,7 +363,7 @@ tensorflow::Status ImportBoolArray(const TensorProto& input_tensor,
  Array* output_array) {
  CHECK_EQ(input_tensor.dtype(), DT_BOOL);
  const auto& input_shape = input_tensor.tensor_shape();
  - CHECK_LE(input_shape.dim_size(), 4);
  + CHECK_LE(input_shape.dim_size(), 6);
  int input_flat_size;
  auto status = ImportShape(input_shape.dim(), &input_flat_size,
  output_array->mutable_shape());
  @@ -409,7 +409,7 @@ tensorflow::Status ImportStringArray(const TensorProto& input_tensor,
  Array* output_array) {
  CHECK_EQ(input_tensor.dtype(), DT_STRING);
  const auto& input_shape = input_tensor.tensor_shape();
  - CHECK_LE(input_shape.dim_size(), 4);
  + CHECK_LE(input_shape.dim_size(), 6);
  int input_flat_size;
  auto status = ImportShape(input_shape.dim(), &input_flat_size,
  output_array->mutable_shape());
  