public Builder mergeEndDate(com.google.type.Date value) {
      if (endDateBuilder_ == null) {
        if (((bitField0_ & 0x00000004) != 0)
            && endDate_ != null
            && endDate_ != com.google.type.Date.getDefaultInstance()) {
          getEndDateBuilder().mergeFrom(value);
        } else {
          endDate_ = value;
        }
      } else {
        endDateBuilder_.mergeFrom(value);
      }
      if (endDate_ != null) {
        bitField0_ |= 0x00000004;
        onChanged();
      }
      return this;
    }
<pre>
The date on which report generation should stop (Inclusive).
UTC time zone.
</pre>

<code>.google.type.Date end_date = 3;</code>
java-storageinsights/proto-google-cloud-storageinsights-v1/src/main/java/com/google/cloud/storageinsights/v1/FrequencyOptions.java