def logout(session_ids=Hash.new)
      result = SfBase.connection.binding.invalidateSessions(session_ids)
      if"invalidateSessionsResponse" == result.to_s
        return true
      else
        return false
      end
      #result this.connection.binding.logout(Hash.new)
    end
def logout(session_ids=Hash.new)
      result = SfBase.connection.binding.invalidateSessions(session_ids)
      if"invalidateSessionsResponse" == result.to_s
        return true
      else
        return false
      end
      #result this.connection.binding.logout(Hash.new)
    end
Logs out of the Salesforce session