code: public java.util.List<DoubleRange> getIopsToStorageRatio() {
          if (iopsToStorageRatio == null) {
              iopsToStorageRatio = new com.amazonaws.internal.SdkInternalList<DoubleRange>();
          }
          return iopsToStorageRatio;
      }
docs: <p>
  The valid range of Provisioned IOPS to gibibytes of storage multiplier. For example, 3-10, which means that
  provisioned IOPS can be between 3 and 10 times storage.
  </p>
  
  @return The valid range of Provisioned IOPS to gibibytes of storage multiplier. For example, 3-10, which means
  that provisioned IOPS can be between 3 and 10 times storage.