Final Class Yiisoft\Form\Field\ErrorSummary

                public function addListClass(?string ...$class): self
{
    $new = clone $this;
    Html::addCssClass($new->listAttributes, $class);
    return $new;
}

            

                public function encode(bool $value): self
{
    $new = clone $this;
    $new->encode = $value;
    return $new;
}

            

                public function errors(array $errors): self
{
    $new = clone $this;
    $new->errors = $errors;
    return $new;
}

            

                public function footer(string $value): self
{
    $new = clone $this;
    $new->footer = $value;
    return $new;
}

            

                public function footerAttributes(array $values): self
{
    $new = clone $this;
    $new->footerAttributes = $values;
    return $new;
}

            

                protected function generateContent(): ?string
{
    $errors = $this->filterErrors();
    if (empty($errors)) {
        return null;
    }
    $content = [];
    if ($this->header !== '') {
        $content[] = $this->headerTag === null
            ? ($this->headerEncode ? Html::encode($this->header) : $this->header)
            : CustomTag::name($this->headerTag)
                ->attributes($this->headerAttributes)
                ->content($this->header)
                ->encode($this->headerEncode)
                ->render();
    }
    $content[] = Html::ul()
        ->attributes($this->listAttributes)
        ->strings($errors, [], $this->encode)
        ->render();
    if ($this->footer !== '') {
        $content[] = Html::div($this->footer, $this->footerAttributes)->render();
    }
    return implode("\n", $content);
}

            

                public function header(string $value): self
{
    $new = clone $this;
    $new->header = $value;
    return $new;
}

            

                public function headerAttributes(array $values): self
{
    $new = clone $this;
    $new->headerAttributes = $values;
    return $new;
}

            

                public function headerEncode(bool $encode): self
{
    $new = clone $this;
    $new->headerEncode = $encode;
    return $new;
}

            

                public function headerTag(?string $tag): self
{
    if ($tag === '') {
        throw new InvalidArgumentException('Tag name cannot be empty.');
    }
    $new = clone $this;
    $new->headerTag = $tag;
    return $new;
}

            

                public function listAttributes(array $attributes): self
{
    $new = clone $this;
    $new->listAttributes = $attributes;
    return $new;
}

            

                public function listClass(?string ...$class): self
{
    $new = clone $this;
    $new->listAttributes['class'] = $class;
    return $new;
}

            

                public function onlyCommonErrors(): self
{
    $new = clone $this;
    $new->onlyProperties = [''];
    return $new;
}

            

                public function onlyFirst(bool $value = true): self
{
    $new = clone $this;
    $new->onlyFirst = $value;
    return $new;
}

            

                public function onlyProperties(string ...$names): self
{
    $new = clone $this;
    $new->onlyProperties = $names;
    return $new;
}