private void ensureFeaturesIsMutable() {
      if (!((bitField0_ & 0x00000002) != 0)) {
        features_ = new java.util.ArrayList<com.google.cloud.vision.v1.Feature>(features_);
        bitField0_ |= 0x00000002;
      }
    }
<pre>
Required. Information about the input file.
</pre>

<code>.google.cloud.vision.v1.InputConfig input_config = 1;</code>
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/AsyncAnnotateFileRequest.java