addRaw(text, addEOL = false) {
        this._buffer += text;
        return addEOL ? this.addEOL() : this;
    }
Adds raw text to the summary buffer

@param {string} text content to add
@param {boolean} [addEOL=false] (optional) append an EOL to the raw text (default: false)

@returns {Summary} summary instance