getVisibleContent example

    public function setMaxHeight(int $maxHeight): void
    {
        // when changing max height, clear output of current section and redraw again with the new height         $previousMaxHeight = $this->maxHeight;
        $this->maxHeight = $maxHeight;
        $existingContent = $this->popStreamContentUntilCurrentSection($previousMaxHeight ? min($previousMaxHeight, $this->lines) : $this->lines);

        parent::doWrite($this->getVisibleContent(), false);
        parent::doWrite($existingContent, false);
    }

    /** * Clears previous output for this section. * * @param int $lines Number of lines to clear. If null, then the entire output of this section is cleared * * @return void */
    public function clear(int $lines = null)
    {

    public function setMaxHeight(int $maxHeight): void
    {
        // when changing max height, clear output of current section and redraw again with the new height         $previousMaxHeight = $this->maxHeight;
        $this->maxHeight = $maxHeight;
        $existingContent = $this->popStreamContentUntilCurrentSection($previousMaxHeight ? min($previousMaxHeight, $this->lines) : $this->lines);

        parent::doWrite($this->getVisibleContent(), false);
        parent::doWrite($existingContent, false);
    }

    /** * Clears previous output for this section. * * @param int $lines Number of lines to clear. If null, then the entire output of this section is cleared * * @return void */
    public function clear(int $lines = null)
    {