docs: def get_ldap(cls, global_options=None):
          """
          Returns the ldap module. The unit test harness will assign a mock object
          to _LDAPConfig.ldap. It is imperative that the ldap module not be
          imported anywhere else so that the unit tests will pass in the absence
          of python-ldap.
          """
          if cls.ldap is None:
              import ldap.filter
  
              # Support for python-ldap < 2.0.6
              try:
                  import ldap.dn
              except ImportError:
                  from django_auth_ldap import dn
                  ldap.dn = dn
  
              cls.ldap = ldap
  
          # Apply global LDAP options once
          if (not cls._ldap_configured) and (global_options is not None):
              for opt, value in global_options.items():
                  cls.ldap.set_option(opt, value)
  
              cls._ldap_configured = True
  
          return cls.ldap