protected static ContentTags getContent(EvalFilePaths evalFilePaths, Metadata metadata) {
        if (metadata == null) {
            return ContentTags.EMPTY_CONTENT_TAGS;
        }
        return parseContentAndTags(evalFilePaths, metadata);
    }
Get the content and record in the data {@link Cols#CONTENT_TRUNCATED_AT_MAX_LEN} whether the string was truncated

@param contentTags
@param maxLength
@param data
@return
tika-eval/tika-eval-app/src/main/java/org/apache/tika/eval/app/AbstractProfiler.java