public static function getSymfonyRules20()
    {
        return [
            'blank_line_after_opening_tag'                => true,
            'blank_line_before_return'                    => true,
            'cast_spaces'                                 => true,
            'concat_without_spaces'                       => false,
            'function_typehint_space'                     => true,
            'hash_to_slash_comment'                       => true,
            'heredoc_to_nowdoc'                           => false,
            'include'                                     => true,
            'lowercase_cast'                              => true,
            'method_separation'                           => true,
            'native_function_casing'                      => true,
            'new_with_braces'                             => true,
            'no_alias_functions'                          => true,
            'no_blank_lines_after_class_opening'          => true,
            'no_blank_lines_after_phpdoc'                 => true,
            'no_empty_statement'                          => true,
            'no_extra_consecutive_blank_lines'            => true,
            'no_leading_import_slash'                     => true,
            'no_leading_namespace_whitespace'             => true,
            'no_multiline_whitespace_around_double_arrow' => true,
            'no_short_bool_cast'                          => true,
            'no_singleline_whitespace_before_semicolons'  => true,
            'no_spaces_inside_offset'                     => true,
            'no_trailing_comma_in_list_call'              => true,
            'no_trailing_comma_in_singleline_array'       => true,
            'no_unneeded_control_parentheses'             => true,
            'no_unreachable_default_argument_value'       => true,
            'no_unused_imports'                           => true,
            'no_whitespace_before_comma_in_array'         => true,
            'no_whitespace_in_blank_lines'                => true,
            'object_operator_without_whitespace'          => true,
            'phpdoc_align'                                => true,
            'phpdoc_indent'                               => true,
            'phpdoc_inline_tag'                           => true,
            'phpdoc_no_access'                            => true,
            'phpdoc_no_empty_return'                      => true,
            'phpdoc_no_package'                           => true,
            'phpdoc_scalar'                               => true,
            'phpdoc_separation'                           => true,
            'phpdoc_single_line_var_spacing'              => true,
            'phpdoc_summary'                              => true,
            'phpdoc_to_comment'                           => true,
            'phpdoc_trim'                                 => true,
            'phpdoc_type_to_var'                          => true,
            'phpdoc_types'                                => true,
            'phpdoc_var_without_name'                     => true,
            'pre_increment'                               => true,
            'print_to_echo'                               => false,
            'self_accessor'                               => false,
            'short_scalar_cast'                           => true,
            'simplified_null_return'                      => true,
            'single_blank_line_before_namespace'          => true,
            'single_quote'                                => true,
            'space_after_semicolon'                       => true,
            'standardize_not_equals'                      => true,
            'ternary_operator_spaces'                     => true,
            'trailing_comma_in_multiline_array'           => true,
            'trim_array_spaces'                           => true,
            'unalign_double_arrow'                        => true,
            'unalign_equals'                              => true,
            'unary_operator_spaces'                       => true,
            'whitespace_after_comma_in_array'             => true,
        ];
    }