code: public ZoneOffset getStandardOffset(Instant instant) {
          if (savingsInstantTransitions.length == 0) {
              return standardOffsets[0];
          }
          long epochSec = instant.getEpochSecond();
          int index  = Arrays.binarySearch(standardTransitions, epochSec);
          if (index < 0) {
              // switch negative insert position to start of matched range
              index = -index - 2;
          }
          return standardOffsets[index + 1];
      }
docs: Gets the standard offset for the specified instant in this zone.
  <p>
  This provides access to historic information on how the standard offset
  has changed over time.
  The standard offset is the offset before any daylight saving time is applied.
  This is typically the offset applicable during winter.
  
  @param instant  the instant to find the offset information for, not null, but null
  may be ignored if the rules have a single offset for all instants
  @return the standard offset, not null