public Builder clearIsPrefix() {
        bitField0_ = (bitField0_ & ~0x00000002);
        isPrefix_ = false;
        onChanged();
        return this;
      }
<pre>
True if break prepends the element.
</pre>

<code>bool is_prefix = 2;</code>

@return This builder for chaining.
java-vision/proto-google-cloud-vision-v1p1beta1/src/main/java/com/google/cloud/vision/v1p1beta1/TextAnnotation.java