1814     var kwargs = parameters[parameters.length - 1];
1815     if (kwargs != null && Opal.respond_to(kwargs, '$to_hash', true)) {
1817       return kwargs;
1828   // @param given_args [Hash] all kwargs given to method
1829   // @param used_args [Object<String: true>] all keys used as named kwargs
2909   Opal.ensure_kwargs = function(kwargs) {  argument
2910     if (kwargs == null) {
2912     } else if (kwargs.$$is_hash) {
2913       return kwargs;
2915       $raise(Opal.ArgumentError, 'expected kwargs');
2919   Opal.get_kwarg = function(kwargs, key) {  argument
2920     if (!$has_own(kwargs.$$smap, key)) {
2923     return kwargs.$$smap[key];
4709     $def(self, '$clone', function $$clone($kwargs) {  argument
4713       $kwargs = $ensure_kwargs($kwargs);
4715       freeze = $kwargs.$$smap["freeze"];if (freeze == null) freeze = nil;
4727     $def(self, '$initialize_clone', function $$initialize_clone(other, $kwargs) {  argument
4731       $kwargs = $ensure_kwargs($kwargs);
4733       $kwargs.$$smap["freeze"];      self.$initialize_copy(other);
5239       var $post_args, $kwargs, strs, uplevel, $c, $d, self = this, location = nil;
5245       $kwargs = $extract_kwargs($post_args);
5246       $kwargs = $ensure_kwargs($kwargs);
5249       uplevel = $kwargs.$$smap["uplevel"];if (uplevel == null) uplevel = nil;
5372     $def(self, '$require_tree', function $$require_tree(path, $kwargs) {  argument
5376       $kwargs = $ensure_kwargs($kwargs);
5378       autoload = $kwargs.$$smap["autoload"];if (autoload == null) autoload = false;
5762     $def(self, '$full_message', function $$full_message(kwargs) {  argument
5767       if (kwargs == null) kwargs = nil;
5770 …}      kwargs = $hash2(["highlight", "order"], {"highlight": $gvars.stderr['$tty?'](), "order": "t…
5771 …   $b = [kwargs['$[]']("highlight"), kwargs['$[]']("order")], (highlight = $b[0]), (order = $b[1]);
5901     return $def(self, '$initialize', function $$initialize(message, $kwargs) {  argument
5906       $kwargs = $ensure_kwargs($kwargs);
5908       receiver = $kwargs.$$smap["receiver"];if (receiver == null) receiver = nil;
5979     $def(self, '$initialize', function $$initialize(message, $kwargs) {  argument
5984       $kwargs = $ensure_kwargs($kwargs);
5986       receiver = $kwargs.$$smap["receiver"];if (receiver == null) receiver = nil;
5988       key = $kwargs.$$smap["key"];if (key == null) key = nil;
6096     $def(self, '$clone', function $$clone($kwargs) {  argument
6099       $kwargs = $ensure_kwargs($kwargs);
6101       $kwargs.$$smap["freeze"];      return nil;
6253     $def(self, '$clone', function $$clone($kwargs) {  argument
6257       $kwargs = $ensure_kwargs($kwargs);
6259       $kwargs.$$smap["freeze"];      return self;
6778     $def(self, '$initialize', function $$initialize(regexp, match_groups, $kwargs) {  argument
6782       $kwargs = $ensure_kwargs($kwargs);
6784       no_matchdata = $kwargs.$$smap["no_matchdata"];if (no_matchdata == null) no_matchdata = false;
7029       var $post_args, $kwargs;
7033       $kwargs = $extract_kwargs($post_args);
7034       $kwargs = $ensure_kwargs($kwargs);
7037       $kwargs.$$smap["encoding"];      
7038       $kwargs.$$smap["capacity"];      return nil;
7365     $def(self, '$clone', function $$clone($kwargs) {  argument
7369       $kwargs = $ensure_kwargs($kwargs);
7371       freeze = $kwargs.$$smap["freeze"];if (freeze == null) freeze = nil;
7466       var block = $$each_line.$$p || nil, $post_args, $kwargs, separator, chomp, self = this;
7471       $kwargs = $extract_kwargs($post_args);
7472       $kwargs = $ensure_kwargs($kwargs);
7476       chomp = $kwargs.$$smap["chomp"];if (chomp == null) chomp = false;
7737       var block = $$lines.$$p || nil, $post_args, $kwargs, separator, chomp, self = this, e = nil;
7742       $kwargs = $extract_kwargs($post_args);
7743       $kwargs = $ensure_kwargs($kwargs);
7747       chomp = $kwargs.$$smap["chomp"];if (chomp == null) chomp = false;
8095     $def(self, '$scan', function $$scan(pattern, $kwargs) {  argument
8099       $kwargs = $ensure_kwargs($kwargs);
8101       no_matchdata = $kwargs.$$smap["no_matchdata"];if (no_matchdata == null) no_matchdata = false;
11805 …var block = $$step.$$p || nil, $post_args, $kwargs, limit, step, to, by, self = this, counter = ni…
11809       $kwargs = $extract_kwargs($post_args);
11810       $kwargs = $ensure_kwargs($kwargs);
11814       to = $kwargs.$$smap["to"];      
11815       by = $kwargs.$$smap["by"];      
12008     $def(self, '$clone', function $$clone($kwargs) {  argument
12012       $kwargs = $ensure_kwargs($kwargs);
12014       $kwargs.$$smap["freeze"];      return self;
17694     $def(self, '$parameters', function $$parameters($kwargs) {  argument
17698       $kwargs = $ensure_kwargs($kwargs);
17700       lambda = $kwargs.$$smap["lambda"];      
21541 …var block = $Struct_new$1.$$p || nil, $post_args, $kwargs, args, keyword_init, self = this, klass …
21545       $kwargs = $extract_kwargs($post_args);
21546       $kwargs = $ensure_kwargs($kwargs);
21549       keyword_init = $kwargs.$$smap["keyword_init"];if (keyword_init == null) keyword_init = false;
21641       var $post_args, args, self = this, kwargs = nil, $ret_or_1 = nil, extra = nil;
21648         kwargs = ($truthy(($ret_or_1 = args.$last())) ? ($ret_or_1) : ($hash2([], {})));
21649 … if (($truthy($rb_gt(args.$length(), 1)) || ($truthy((args.length === 1 && !kwargs.$$is_hash))))) {
21651         }        extra = $rb_minus(kwargs.$keys(), self.$class().$members());
21658 …return ($b = [name, kwargs['$[]'](name)], $send(self, '[]=', $b), $b[$b.length - 1]);}, {$$s: self…