SetLevel
void SetLevel(int level);
void SetLevel(int level);
check.SetLevel(level);
static void SetLevel(log_level value);
rootAttributeHandler->SetLevel(0);
rootAttributeHandler->SetLevel(0);
childHandler->SetLevel(++level);
rootAttributeHandler->SetLevel(0);
rootAttributeHandler->SetLevel(0);
childHandler->SetLevel(++level);