ServerEvents.recipes(event => {
event.custom({"type":"minecraft:smelting","cookingtime":100,"experience":0.7,"ingredient":{"item":"minecraft:rotten_flesh"},"result":"minecraft:leather"});
event.custom({"type":"minecraft:smelting","cookingtime":100,"experience":0.7,"ingredient":{"item":"industrialforegoing:plastic"},"result":"gtceu:rubber_ingot"});
})