'The subheadings for the mobile form (lazy property)'

@property
def subheadings(self):

    subheadings = self._subheadings
    if (subheadings is DEFAULT):
        setting = self.resource.get_config('subheadings')
        subheadings = self._subheadings = self.subheadings_l10n(setting)
    return subheadings
