GT5-Unofficial/main/java/gregtech/api/objects
..
ElementStack.java
GT_ArrayList.java
GT_CopiedBlockTexture.java
GT_Cover_Default.java
GT_Cover_None.java
GT_Fluid.java
GT_FluidStack.java
GT_HashSet.java
GT_ItemStack.java
GT_MultiTexture.java
GT_RenderedTexture.java
GT_SidedTexture.java
ItemData.java
MaterialStack.java