code: def for_instances(cls, data, multi=None):
          
          if multi is None:
              return Capabilities(javabridge.static_call(
                  "weka/core/Capabilities", "forInstances",
                  "(Lweka/core/Instances;)Lweka/core/Capabilities;", data.jobject))
          else:
              return Capabilities(javabridge.static_call(
                  "weka/core/Capabilities", "forInstances",
                  "(Lweka/core/Instances;Z)Lweka/core/Capabilities;", data.jobject, multi))
docs: returns a Capabilities object specific for this data. The minimum number of instances is not set, the check
          for multi-instance data is optional.
  
          :param data: the data to generate the capabilities for
          :type data: Instances
          :param multi: whether to check the structure, too
          :type multi: bool
          :return: the generated capabilities
          :rtype: Capabilities