private com.google.protobuf.MapField<java.lang.String, java.lang.String>
        internalGetMutableAdTagMacroMap() {
      if (adTagMacroMap_ == null) {
        adTagMacroMap_ =
            com.google.protobuf.MapField.newMapField(AdTagMacroMapDefaultEntryHolder.defaultEntry);
      }
      if (!adTagMacroMap_.isMutable()) {
        adTagMacroMap_ = adTagMacroMap_.copy();
      }
      bitField0_ |= 0x00000020;
      onChanged();
      return adTagMacroMap_;
    }
<pre>
Ad tag URI. For most use cases, you should create a
[VodConfig][google.cloud.video.stitcher.v1.VodConfig] with this information
rather than setting this field directly.
</pre>

<code>string ad_tag_uri = 6;</code>

@param value The bytes for adTagUri to set.
@return This builder for chaining.
java-video-stitcher/proto-google-cloud-video-stitcher-v1/src/main/java/com/google/cloud/video/stitcher/v1/VodSession.java