How to use the pygw.config.config.MODULE__core_store function in pygw

def __init__(self):
        j_qbuilder = config.MODULE__core_store.QueryBuilder.newBuilder()
        super().__init__(config.GATEWAY, j_qbuilder)

def add_index(self, type_name, *indices):
        """
        Add new indices for a given data type. 

        Args:
            type_name (str) : name of data type to register indices to
            *indices (pygw.base_models.Index) : Index to add
        """
        assert isinstance(type_name,str)

        n = len(indices)
        j_index_class = config.MODULE__core_store.Index
        j_index_arr = config.GATEWAY.new_array(j_index_class,n)
        for idx, py_obj in enumerate(indices):
                j_index_arr[idx] = py_obj._java_ref
    
        self._java_ref.addType(type_name,j_index_arr)

that works for a given file. 

        Args:
            url (str) : The URL for data to read and ingest into this data store
            *indices (pygw.base_models.Index) : Index to ingest into
            ingest_options : Options for ingest
        """ 
        # TODO: Ingest Options
        if ingest_options: raise NotImplementedError()

        # TODO: Not Fully implemented!

        assert isinstance(url,str)

        n = len(indices)
        j_index_class = config.MODULE__core_store.Index
        j_index_arr = config.GATEWAY.new_array(j_index_class,n)
        for idx, name in enumerate(indices):
                j_index_arr[idx] = name._java_ref
        java_url = config.GATEWAY.jvm.java.net.URL(url)
        self._java_ref.ingest(java_url,ingest_options,j_index_arr)