if (parameters[0] != null && parameters[0] instanceof StatementParameterDirection) {
ForgeDirection side = ((StatementParameterDirection) parameters[0]).direction;
if (side != ForgeDirection.UNKNOWN) {
transport.allowInput(side, state.inputOpen);
transport.allowOutput(side, state.outputOpen);
}
} else {
for (ForgeDirection side : ForgeDirection.VALID_DIRECTIONS) {
transport.allowInput(side, state.inputOpen);
transport.allowOutput(side, state.outputOpen);