@java.lang.Override
  public boolean hasGcsSource() {
    return ((bitField0_ & 0x00000001) != 0);
  }
<pre>
The Google Cloud Storage location to read the input from.
</pre>

<code>.google.cloud.vision.v1.GcsSource gcs_source = 1;</code>

@return Whether the gcsSource field is set.
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/InputConfig.java