Command line execution strategy that prints help if requested, and otherwise executes the top-level command and
all subcommands as Runnable, Callable or Method.
Returns the execution strategy used by the execute method to invoke
the business logic on the user objects of this command and/or the user-specified subcommand(s).
Sets the execution strategy that the execute method should use to invoke
the business logic on the user objects of this command and/or the user-specified subcommand(s).
CommandLine.execute(String...)
,CommandLine.getExecutionStrategy()
,CommandLine.getParameterExceptionHandler()
,CommandLine.getExecutionExceptionHandler()