removed method_exists() check for reflection method isOptional() this check was needed to support versions of PHP below 5.0.3 and is no longer needed
removed method_exists() check for reflection method isOptional()
this check was needed to support versions of PHP below 5.0.3 and is no longer needed

simpletest/simpletest,simpletest/simpletest,simpletest/simpletest,simpletest/simpletest