function ComparisonRenderer (config) {
    BaseRenderer.call(this);
    this.config = assign({}, defaultOptions(), config);
    if (typeof this.config.stringify === 'function') {
        this.stringify = this.config.stringify;
    } else {
        this.stringify = stringifier(this.config);
    }
    if (typeof this.config.diff === 'function') {
        this.diff = this.config.diff;
    } else {
        this.diff = udiff(this.config);
    }
    this.espathToPair = {};
}
options.stringify [function]
options.maxDepth [number]
options.lineSeparator [string]
options.anonymous [string]
options.circular [string]

options.diff [function]
options.lineDiffThreshold [number]