EffectTypeLimitation :: union or array[union] Example code
Union members
"speed" | Modules that increase or decrease the machine's speed. |
"productivity" | Modules that make the machine produce bonus items. |
"consumption" | Modules that increase or decrease the machine's energy consumption. |
"pollution" | Modules that make the machine produce more or less pollution. |
"quality" | Modules that provide a bonus chance to increase a product's quality. |
Examples 
-- Allow all module types
allowed_effects = {"speed", "productivity", "consumption", "pollution", "quality"}
-- Allow only modules that affect speed
allowed_effects = "speed"
