get isone to return true or false for IsingBimodule

Author: borisdevos

src/multifusion.jl

@@ -82,6 +82,8 @@ function Base.one(a::IsingBimodule)
     return IsingBimodule(a.row, a.col, 0)
 end
 
+# Base.isone(a::IsingBimodule) = leftone(a) == a == rightone(a)
+
 function Base.one(::Type{IsingBimodule})
     throw(ArgumentError("one of Type IsingBimodule doesn't exist"))
 end