@Override
    public String toString() {

        return "InsertIntoStream{" +
                "isFaultStream=" + isFaultStream +
                ", isInnerStream=" + isInnerStream +
                '}';
    }
Query output stream inserting events in to another stream, table, or window
modules/siddhi-query-api/src/main/java/io/siddhi/query/api/execution/query/output/stream/InsertIntoStream.java