private com.google.protobuf.SingleFieldBuilderV3<
            com.google.type.DateTime,
            com.google.type.DateTime.Builder,
            com.google.type.DateTimeOrBuilder>
        getTargetDatetimeFieldBuilder() {
      if (targetDatetimeBuilder_ == null) {
        targetDatetimeBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.type.DateTime,
                com.google.type.DateTime.Builder,
                com.google.type.DateTimeOrBuilder>(
                getTargetDatetime(), getParentForChildren(), isClean());
        targetDatetime_ = null;
      }
      return targetDatetimeBuilder_;
    }
<pre>
The date for which report is generated. The time part of target_datetime
will be zero till we support multiple reports per day.
</pre>

<code>.google.type.DateTime target_datetime = 6;</code>
java-storageinsights/proto-google-cloud-storageinsights-v1/src/main/java/com/google/cloud/storageinsights/v1/ReportDetail.java