private com.google.protobuf.SingleFieldBuilderV3<
              com.google.cloud.visionai.v1.GstreamerBufferDescriptor,
              com.google.cloud.visionai.v1.GstreamerBufferDescriptor.Builder,
              com.google.cloud.visionai.v1.GstreamerBufferDescriptorOrBuilder>
          getGstreamerBufferDescriptorFieldBuilder() {
        if (gstreamerBufferDescriptorBuilder_ == null) {
          if (!(typeDetailsCase_ == 2)) {
            typeDetails_ =
                com.google.cloud.visionai.v1.GstreamerBufferDescriptor.getDefaultInstance();
          }
          gstreamerBufferDescriptorBuilder_ =
              new com.google.protobuf.SingleFieldBuilderV3<
                  com.google.cloud.visionai.v1.GstreamerBufferDescriptor,
                  com.google.cloud.visionai.v1.GstreamerBufferDescriptor.Builder,
                  com.google.cloud.visionai.v1.GstreamerBufferDescriptorOrBuilder>(
                  (com.google.cloud.visionai.v1.GstreamerBufferDescriptor) typeDetails_,
                  getParentForChildren(),
                  isClean());
          typeDetails_ = null;
        }
        typeDetailsCase_ = 2;
        onChanged();
        return gstreamerBufferDescriptorBuilder_;
      }
<pre>
GstreamerBufferDescriptor is the descriptor for gstreamer buffer type.
</pre>

<code>.google.cloud.visionai.v1.GstreamerBufferDescriptor gstreamer_buffer_descriptor = 2;
</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/PacketType.java