code: public static AbstractHtml findOneTagByTagName(final String tagName,
              final AbstractHtml... fromTags) throws NullValueException {
          return findOneTagByTagName(false, tagName, fromTags);
      }
docs: Finds and returns the first (including the nested tags) matching with the
  given tag name.
  
  @param tagName
  the name of the tag.
  @param fromTags
  from which the findings to be done.
  @return the first matching tag with the given tag name.
  @throws NullValueException
  if the {@code tagName} or {@code fromTags}
  is null
  @since 2.1.11
  @author WFF