Add pandas converter placeholder

python/src/pyarrow/adapters/pandas.h

@@ -0,0 +1,28 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// 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.
+
+// Functions for converting between pandas's NumPy-based data representation
+// and Arrow data structures
+
+#ifndef PYARROW_ADAPTERS_PANDAS_H
+#define PYARROW_ADAPTERS_PANDAS_H
+
+namespace pyarrow {
+
+} // namespace pyarrow
+
+#endif // PYARROW_ADAPTERS_PANDAS_H