public Builder setImportanceFraction(float value) {

      importanceFraction_ = value;
      bitField0_ |= 0x00000004;
      onChanged();
      return this;
    }
<pre>
Fraction of importance of this salient region with respect to the original
image.
</pre>

<code>float importance_fraction = 3;</code>

@param value The importanceFraction to set.
@return This builder for chaining.
java-vision/proto-google-cloud-vision-v1p2beta1/src/main/java/com/google/cloud/vision/v1p2beta1/CropHint.java