'The 7-bit (base128) numeric value of this group.'

@property
def value(self):

    if hasattr(self, '_m_value'):
        return (self._m_value if hasattr(self, '_m_value') else None)
    self._m_value = (self.b & 127)
    return (self._m_value if hasattr(self, '_m_value') else None)
