chore: import upstream snapshot with attribution

libnd4j/include/graph/VariablesSet.h

@@ -0,0 +1,52 @@
+/* ******************************************************************************
+ *
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Apache License, Version 2.0 which is available at
+ * https://www.apache.org/licenses/LICENSE-2.0.
+ *
+ *  See the NOTICE file distributed with this work for additional
+ *  information regarding copyright ownership.
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ ******************************************************************************/
+
+//
+// Created by raver119 on 15/11/17.
+//
+
+#ifndef LIBND4J_VARIABLESSET_H
+#define LIBND4J_VARIABLESSET_H
+#include <graph/Variable.h>
+
+#include <iterator>
+#include <vector>
+
+namespace sd {
+namespace graph {
+class SD_LIB_EXPORT VariablesSet {
+ protected:
+  std::vector<Variable*> _holder;
+  Status _status;
+
+ public:
+  VariablesSet(Status status = Status::OK);
+  ~VariablesSet();
+
+  Status status();
+
+  int size();
+
+  void push_back(Variable* variable);
+
+  Variable* at(int index);
+};
+}  // namespace graph
+}  // namespace sd
+
+#endif  // LIBND4J_VARIABLESSET_H