Blockmask onlyair attribute includes all non-occluding blocks
Summary
Even with onlyair set to true in blockmask, blocks such as glass and stained glass will also be masked. The documentation specifies it is only air, but that just isn't the case.
Steps to reproduce
Call blockmask with onlyair set to true, create a sphere around current location and have the floor made of stained glass
Current behavior
The non-air blocks are masked
Intended correct behavior
The non-air blocks are not masked
Proposed fixes
Change logic in BlockMaskEffect.java to match other classes that use MaskEffect.ONLY_AIR
BukkitAdapter.adapt(newloc).getBlock().getType() == Material.AIR or block.getType().isAir()
instead of
!newloc.getBlock().getType().isOccluding()