[julia-users] quick 'n ez way to get allsupertypes(x), allsubtypes(x)?

[Jeffrey Sarnoff]

Any advice on quick 'n EZ coding of something like these?

allsupertypes(Irrational) == ( Real, Number, Any )

allsubtypes(Integer) == ( BigInt, Bool,  Signed, 
Int128,Int16,Int32,Int64,Int8, Unsigned, UInt128,UInt16,UInt32,UInt64,UInt8
 )
abstractsubtypes(Integer) == ( Signed, Unsigned )
concretesubtypes(Integer) == ( BigInt,Bool,UInt128,U
Int16,UInt32,UInt64,UInt8,UInt16,UInt32,UInt64,UInt8)