code: public static final long parseLong(CharSequence cs)
      {
          if (CharSequences.startsWith(cs, "0b"))
          {
              return parseLong(cs, 2, 2, cs.length());
          }
          if (CharSequences.startsWith(cs, "0x"))
          {
              return parseLong(cs, 16, 2, cs.length());
          }
          return parseLong(cs, 10);
      }
docs: Equal to calling parseLong(cs, 10).
  @param cs
  @return
  @throws java.lang.NumberFormatException if input cannot be parsed to proper
  long.
  @see java.lang.Long#parseLong(java.lang.String)
  @see java.lang.Character#digit(int, int)