Groovy not in collection

Question

The groovy way to see if something is in a list is to use \"in\"

   if(\'b\' in [\'a\',\'b\',\'c\'])

However how do you nicely see if something

Answer 1

What about disjoint ?

def elements = [1, 2, 3]
def element = 4
assert elements.disjoint([element])
element = 1
assert !elements.disjoint([element])

Bonus : it stops iterating when an element match