As discussed with @kitaisreal 
{
    return table_ttl.rows_where_ttl;
}
bool StorageInMemoryMetadata::hasAnyRowsWhereTTL() const
{
    return !table_ttl.rows_where_ttl.empty();
}
TTLDescriptions StorageInMemoryMetadata::getMoveTTLs() const
{
    return table_ttl.move_ttl;
}
bool StorageInMemoryMetadata::hasAnyMoveTTL() const
{
    return !table_ttl.move_ttl.empty();
}
TTLDescriptions StorageInMemoryMetadata::getRecompressionTTLs() const
{
    return table_ttl.recompression_ttl;
}
bool StorageInMemoryMetadata::hasAnyRecompressionTTL() const
{
    return !table_ttl.recompression_ttl.empty();
}
TTLDescriptions StorageInMemoryMetadata::getGroupByTTLs() const
{
    return table_ttl.group_by_ttl;
}
bool StorageInMemoryMetadata::hasAnyGroupByTTL() const