25     private $stack = [];  variable in GuzzleHttp\\HandlerStack
49         $stack = new self($handler ?: Utils::chooseHandler());
50         $stack->push(Middleware::httpErrors(), 'http_errors');
51         $stack->push(Middleware::redirect(), 'allow_redirects');
52         $stack->push(Middleware::cookies(), 'cookies');
53         $stack->push(Middleware::prepareBody(), 'prepare_body');
55         return $stack;
86         $stack = [];
89             $stack[] = '0) Handler: '.$this->debugCallable($this->handler);
93         foreach (\array_reverse($this->stack) as $tuple) {
98             $stack[] = $str;
101         foreach (\array_keys($stack) as $k) {
102             $result .= "< {$stack[$k]}\n";
136         \array_unshift($this->stack, [$middleware, $name]);
148         $this->stack[] = [$middleware, $name];
189         $this->stack = \array_values(\array_filter(
190             $this->stack,
209             foreach (\array_reverse($this->stack) as $fn) {
222         foreach ($this->stack as $k => $v) {
242                 \array_unshift($this->stack, $tuple);
244                 $replacement = [$tuple, $this->stack[$idx]];
245                 \array_splice($this->stack, $idx, 1, $replacement);
247         } elseif ($idx === \count($this->stack) - 1) {
248             $this->stack[] = $tuple;
250             $replacement = [$this->stack[$idx], $tuple];
251             \array_splice($this->stack, $idx, 1, $replacement);