code: public static String removeLeadingDelimiter(String str, String delimiter) {
          if (!str.startsWith(delimiter)) {
              return str;
          } else {
              return str.substring(delimiter.length(), str.length());
          }
      }
docs: Removes the leading delimiter from a string.
  
  @param str String to process.
  @param delimiter Delimiter to remove.
  @return The string with the leading delimiter removed.