if (sourceModules != null)
{
if (index >= getSourceModuleCount () || index < 0
|| sourceModules[index] == null)
{
throw new ExceptionNoModule ("Could not retrieve a source module " +
"from a noise module.");
}
return (sourceModules[index]);
}
throw new ExceptionNoModule ("Could not retrieve a source module " +
"from a noise module.");
}