chore: import upstream snapshot with attribution

libnd4j/include/exceptions/impl/unknown_graph_exception.cpp

@@ -0,0 +1,30 @@
+/* ******************************************************************************
+ *
+ *
+ * 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 raver on 8/31/2018.
+//
+#include <exceptions/unknown_graph_exception.h>
+#include <helpers/StringUtils.h>
+
+namespace sd {
+unknown_graph_exception::unknown_graph_exception(LongType graphId)
+    : graph_exception(StringUtils::buildGraphErrorMessage("Unknown graph", graphId), graphId) {
+  _graphId = graphId;
+}
+}  // namespace sd