//keep track of the active strategy (note: a strategy is like a plugin and adds additional functionality/operations)
public void SetStrategy(PlatformBuilderStrategy strategy)
{
activeStrategy = strategy;
_platformBuilder.SetStrategy(strategy, this);
}
//called by the platform class, so it can keep track of the active strategy
public void SetStrategy(PlatformBuilderStrategy strategy, Platform platform)
{
_strategy = strategy;
_strategy.SetParent(platform);
}