public Builder addBlocks(com.google.cloud.vision.v1.Block.Builder builderForValue) {
      if (blocksBuilder_ == null) {
        ensureBlocksIsMutable();
        blocks_.add(builderForValue.build());
        onChanged();
      } else {
        blocksBuilder_.addMessage(builderForValue.build());
      }
      return this;
    }
<pre>
List of blocks of text, images etc on this page.
</pre>

<code>repeated .google.cloud.vision.v1.Block blocks = 4;</code>
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/Page.java