// Then serialized into bytes (on server)
@Override
public void toBytes(ByteBuf buf) {
    // Loop through nutrients and add to buffer
    for (Nutrient nutrient : NutrientList.get()) {
        ByteBufUtils.writeUTF8String(buf, nutrient.name); // Write name as identifier
        buf.writeFloat(serverPlayer.getCapability(CapProvider.NUTRITION_CAPABILITY, null).get(nutrient)); // Write float as value
    }
}

// Then deserialized (on the client)
@Override
public void fromBytes(ByteBuf buf) {
    // Loop through buffer stream to build nutrition data
    clientNutrients = new HashMap<>();
    while(buf.isReadable()) {
        String identifier = ByteBufUtils.readUTF8String(buf);
        Float value = buf.readFloat();
        clientNutrients.put(NutrientList.getByName(identifier), value);
    }
}