def _get_impl():
    global _RPCIMPL
    if _RPCIMPL is None:
        try:
            _RPCIMPL = importutils.import_module(CONF.rpc_backend)
        except ImportError:
            # For backwards compatibility with older nova config.
            impl = CONF.rpc_backend.replace('nova.rpc',
                                            'nova.openstack.common.rpc')
            _RPCIMPL = importutils.import_module(impl)
    return _RPCIMPL
mimeData(itemList) -> None        
dataset/ETHPy150Open Havate/havate-openstack/proto-build/gui/horizon/Horizon_GUI/openstack_dashboard/openstack/common/rpc/__init__.py/_get_impl--crossover with--dataset/ETHPy150Open VisTrails/VisTrails/vistrails/gui/collection/workspace.py/QVistrailList.mimeData