The file src/arrow_c_abi.h is vendored verbatim from the Apache Arrow
project and is licensed under the Apache License, Version 2.0.

    Copyright The Apache Software Foundation
    https://www.apache.org/licenses/LICENSE-2.0

It contains only the ABI-stable struct definitions of the Arrow C Data
Interface and C Stream Interface (plain-C struct layouts and function-pointer
signatures). It includes no Arrow source code and requires neither the Arrow
C++ headers nor linking against libarrow.

Reference: https://arrow.apache.org/docs/format/CDataInterface.html

All other files in this package are licensed under the MIT License; see the
LICENSE file.