Defines a generic FirewallTransaction base class and concrete subclasses (ServiceTransaction, PortTransaction, SourceTransaction, etc.) that encapsulate firewalld rule operations. Each transaction implements get_enabled_*, set_enabled_*, and set_disabled_* methods, providing a clean, reusable pattern for managing stateful resources with support for permanent and runtime changes. This component is self-contained, depends only on the firewalld Python library, and can be extracted for use in other projects that need to manage firewalld or similar stateful services.

Implements a respawn mechanism that probes the system Python interpreter for missing libraries (e.g., selinux, firewall) and re-executes the module under that interpreter. This is a clever workaround for Ansible modules that require system-specific Python bindings not available in the default interpreter. The pattern is self-contained, reusable for any Ansible module that needs to fall back to a system interpreter, and demonstrates non-obvious skill in handling cross-interpreter dependencies.

An Ansible callback plugin that collects and displays timing information for each task, including cumulative and per-task durations. It formats output with human-readable time strings and alignment. The pattern of hooking into Ansible's callback events to gather performance data is reusable for any custom profiling or monitoring callback. The code is well-structured, uses a simple data collection approach, and can be adapted to other event-driven systems beyond Ansible.