@Override
    public String toString() {
        int colId = 0;
        StringBuilder sb = new StringBuilder();
        sb.append('{');
        for (ColumnSchema cs : creator.originalSchema) {
            sb.append('\"').append(cs.getName()).append("\": ");
            if (cs.getDataType() == ColumnType.STRING) {
                sb.append('\"').append(getInternalString(colId, cs.getDataType())).append('\"');
            } else {
                sb.append(getInternalString(colId, cs.getDataType()));
            }
            colId++;
            if (colId < creator.columnCount) {
                sb.append(',');
            }
        }
        sb.append('}');
        return sb.toString();
    }
The aproximately memeory usage of this object. Currently only return the raw row data size.
indexr-segment/src/main/java/io/indexr/segment/rt/UTF8Row.java