'Stores in the current object a request to append to an env variable
Args:
name: name of the environment variable to be appended to
value: value to append to the environment variable
Appends with spaces separating different additions to the variable'

def append_flags(self, name, value, sep='    ', **kwargs):

    kwargs.update(self._get_outside_caller_attributes())
    kwargs.update({'separator': sep})
    item = AppendFlagsEnv(name, value, **kwargs)
    self.env_modifications.append(item)
