So I just updated my WIP mod to Minecraft 1.11, following ShadowFact's tutorial here and I managed to get it working. However, this bit stumped me:
Note: The default Forge MDK comes with older MCP mappings in which the new ItemStack methods aren’t named. You’ll need to change the mappings version from snapshot_20161111 to the latest (snapshot_20161127 as of this post).
I did some googling and found that to change the mappings version you go into the build.gradle file and change the "mappings" value in the "Minecraft block. I changed it to
mappings = "snapshot_20161130"
which was the most recent snapshot (more recent than the one mentioned in the tutorial), and ran setupDecompWorkspace again. Lo and behold, I booted up Eclipse, and... no named ItemStack methods. I refreshed all the folders in the project, still nothing. I feel like I'm probably missing something really obvious. Any ideas?