code: public String checkBlackListCommitAuthor(String author) {
          Set<String> authors = getBlacklistedCommitAuthors();
          authors.remove("");
  
          Map<Pattern, String> skipPatterns = new HashMap<Pattern, String>();
          for (String s : authors) {
              s = s.trim();
              if (compilePattern(s).matcher(author).matches()) {
                  return s;
              }
          }
          return null;
      }
docs: Checks for skip build commit author.
  
  @param author The GitHub commit author
  @return the skip sender or null if should not skip