.FastAIissubblock

			function issubblock(subblock, superblock)

Predicate whether subblock is a subblock of superblock. This means that subblock is

• a subtype of a type superblock <: Type{AbstractBlock}

• an instance of a subtype of superblock <: Type{AbstractBlock}

• equal to superblock

Both arguments can also be tuples. In that case, each element of the tuple subblock is compared recursively against the elements of the tuple superblock.