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Interfaces Interface Description alexiil.mc.lib.attributes.fluid.FluidInvAmountChangeListener alexiil.mc.lib.attributes.fluid.FluidProviderItem This has been completely replaced by item-based attribute accessors andFluidContainerRegistry. 
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Classes Class Description alexiil.mc.lib.attributes.fluid.impl.SimpleFixedFluidInvExtractable This has been replaced withFixedFluidInv.getMappedInv(int...)followed byFixedFluidInv.getExtractable(). (And optionallyFluidExtractable.getPureExtractable()if you only want to expose it as an extractable).alexiil.mc.lib.attributes.fluid.impl.SimpleFixedFluidInvInsertable This has been replaced withFixedFluidInv.getMappedInv(int...)followed byFixedFluidInv.getInsertable(). (And optionallyFluidInsertable.getPureInsertable()if you only want to expose it as an insertable).alexiil.mc.lib.attributes.fluid.render.ImplicitVanillaFluidVolumeRenderer BecauseDefaultFluidVolumeRendererdoes everything that this does.alexiil.mc.lib.attributes.fluid.volume.NormalFluidKey Because anyFluidKeycan map to a singleFluid, andSimpleFluidKeyhas a much better name than this.alexiil.mc.lib.attributes.fluid.volume.NormalFluidVolume Because anyFluidKeycan map to a singleFluid, andSimpleFluidVolumehas a much better name than this.alexiil.mc.lib.attributes.item.impl.SimpleFixedItemInv You should use eitherDirectFixedItemInvorFullFixedItemInvinstead of this!Full explanation: As of LBA 0.5.0 there's been a large change to how inventories work to be much closer to vanilla - inventories no longer return immutable stacks from
FixedItemInvView.getInvStack(int), and 2 new sub-interfaces have been created to handle the different ways of using this, eitherFixedItemInv.ModifiableFixedItemInv(which exposes a markDirty() method just like vanillaInventorydoes), orFixedItemInv.CopyingFixedItemInv(which returns copies of the internalItemStackand supports complete filtering and listener capabilities).You should replace this class with either:
FullFixedItemInvif you either need exact per-slot listening or the full filtration capabilitiesDirectFixedItemInvif you'd rather use a more vanilla oriented approach of being able to directly modify items in an inventory.
alexiil.mc.lib.attributes.item.impl.SimpleFixedItemInvExtractable UseGroupedItemInvFixedWrapperinstead of this!alexiil.mc.lib.attributes.item.impl.SimpleFixedItemInvInsertable UseGroupedItemInvFixedWrapperinstead. 
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Enum Constants Enum Constant Description alexiil.mc.lib.attributes.item.filter.ConstantItemFilter.ANYTHING_EXCEPT_EMPTY alexiil.mc.lib.attributes.item.filter.ConstantItemFilter.ONLY_EMPTY