src/collections/Message.php
public function renderBodyBegin()
    {
        $lines[] = $this->renderCloseButton();
        if ($this->icon !== null) {
            $lines[] = $this->icon;
        }
        $lines[] = $this->renderHeader();

        return implode("\n", $lines);
    }
public function renderBodyBegin()
    {
        $lines[] = $this->renderCloseButton();
        if ($this->icon !== null) {
            $lines[] = $this->icon;
        }
        $lines[] = $this->renderHeader();

        return implode("\n", $lines);
    }
Renders the close button and its header (if any)

@return string the begin of the body