private void ensureBlockedLabelsIsMutable() {
      if (!blockedLabels_.isModifiable()) {
        blockedLabels_ = new com.google.protobuf.LazyStringArrayList(blockedLabels_);
      }
      bitField0_ |= 0x00000002;
    }
<pre>
Only entities with higher score than the threshold will be returned.
Value 0.0 means returns all the detected entities.
</pre>

<code>float confidence_threshold = 1;</code>

@return This builder for chaining.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/VertexAutoMLVideoConfig.java