Hiding A Partition Or A Volume in Boot Screen but still be able to boot from it by unhiding first using Spacebar ?

Hello,

I am using Opencore 0.6.8 and I want to ask if there is any way I could hide a partition Or a volume in boot screen but still be able to boot from it by unhiding first using Spacebar. Something similar to HideAuxiliary but for partitions or drives I choose. Anyone ? Thanks !