code: public final String formatOffsetISO8601Basic(int offset, boolean useUtcIndicator, boolean isShort, boolean ignoreSeconds) {
          return formatOffsetISO8601(offset, true, useUtcIndicator, isShort, ignoreSeconds);
      }
docs: Returns the ISO 8601 basic time zone string for the given offset.
  For example, "-08", "-0830" and "Z"
  
  @param offset the offset from GMT(UTC) in milliseconds.
  @param useUtcIndicator true if ISO 8601 UTC indicator "Z" is used when the offset is 0.
  @param isShort true if shortest form is used.
  @param ignoreSeconds true if non-zero offset seconds is appended.
  @return the ISO 8601 basic format.
  @throws IllegalArgumentException if the specified offset is out of supported range
  (-24 hours &lt; offset &lt; +24 hours).
  @see #formatOffsetISO8601Extended(int, boolean, boolean, boolean)
  @see #parseOffsetISO8601(String, ParsePosition)