**Use case**

Like `date_time_input_format = 'best_effort'` but with disambiguation to American mm/dd/yyyy style.

std::string result_after_delimiter;
        std::string row_before_delimiter;
        std::string row_after_delimiter;
        std::string row_between_delimiter;
        std::string field_delimiter;
        EscapingRule escaping_rule = EscapingRule::Escaped;
    } custom;
    struct
    {
        bool array_of_rows = false;
        bool quote_64bit_integers = true;
        bool quote_denormals = true;
        bool escape_forward_slashes = true;
        bool named_tuples_as_objects = false;
        bool serialize_as_strings = false;
    } json;
    struct
    {
        UInt64 row_group_size = 1000000;
        bool import_nested = false;
        bool allow_missing_columns = false;
    } parquet;
    struct Pretty
    {
        UInt64 max_rows = 10000;
        UInt64 max_column_pad_width = 250;
        UInt64 max_value_width = 10000;
        bool color = true;
        bool output_format_pretty_row_numbers = false;
        enum class Charset