Return module map references.
        :return:

def get_modules_list(self, pattern=None):
        '''
        Return module map references.
        :return:
        '''
        if pattern and '*' not in pattern:
            pattern = '*{0}*'.format(pattern)
        modules = []
        for m_name, m_path in self._modules_map.items():
            m_path = m_path.split('.')[0]
            m_name = '.'.join([elm for elm in m_path.split(os.path.sep) if elm])
            if pattern and fnmatch.fnmatch(m_name, pattern) or not pattern:
                modules.append(m_name)
        return sorted(modules)