Fix #6 by providing non-null BlockGetter and BlockPos values to state.isFaceSturdy in FrameBlock::checkConnection (formerly FrameBlock::validConnection).
Make it so checkConnection only checks the adjacent face of the neighboring block.
Invert the return value of checkConnection inside the function body, because every use of that function was already inverted anyway.
Optimize and inline getConnections.
Fix #6 by providing non-null
BlockGetterandBlockPosvalues tostate.isFaceSturdyinFrameBlock::checkConnection(formerlyFrameBlock::validConnection). Make it socheckConnectiononly checks the adjacent face of the neighboring block. Invert the return value ofcheckConnectioninside the function body, because every use of that function was already inverted anyway. Optimize and inlinegetConnections.