'Add a State/Province/Region field to a form description.
Arguments:
form_desc: A form description
Keyword Arguments:
required (bool): Whether this field is required; defaults to False'

def _add_state_field(self, form_desc, required=False):

    state_label = _(u'State/Province/Region')
    form_desc.add_field('state', label=state_label, required=required)
