Method setCollapsible

libminifi/include/c2/C2Payload.h:174–174

  bool isCollapsible() const noexcept { return is_collapsible_; }
  void setCollapsible(bool is_collapsible) noexcept { is_collapsible_ = is_collapsible; }

  bool isContainer() const noexcept { return is_container_; }
  void setContainer(bool is_container) noexcept { is_container_ = is_container; }