Useful entry points

• lifecycles and plugin bindings to default lifecycle,
• default artifact handlers,
• Toolchains descriptor reference,
• Maven component (javadoc), with its DefaultMaven implementation (source),
• ProjectBuilder component (javadoc), with its DefaultProjectBuilder implementation (source),
• MavenPluginManager component (javadoc), with its DefaultMavenPluginManager implementation (source),
• PluginParameterExpressionEvaluator, used to evaluate plugin parameters values during Mojo configuration,
• classloader hierarchy done by ClassRealmManager component (javadoc), with its DefaultClassRealmManager implementation (source), using Plexus Classworlds,
• ExceptionHandler component (javadoc), with its DefaultExceptionHandler implementation (source), use to transform exception into useful end-user messages.