def Validate(self):
    'GlobExpression is valid.'
    if (len(self.RECURSION_REGEX.findall(self._value)) > 1):
        raise ValueError(('Only one ** is permitted per path: %s.' % self._value))
GlobExpression is valid.
def Validate(self):
    
    if (len(self.RECURSION_REGEX.findall(self._value)) > 1):
        raise ValueError(('Only one ** is permitted per path: %s.' % self._value))