public Builder mergeGcsSource(com.google.cloud.vision.v1.GcsSource value) {
      if (gcsSourceBuilder_ == null) {
        if (((bitField0_ & 0x00000001) != 0)
            && gcsSource_ != null
            && gcsSource_ != com.google.cloud.vision.v1.GcsSource.getDefaultInstance()) {
          getGcsSourceBuilder().mergeFrom(value);
        } else {
          gcsSource_ = value;
        }
      } else {
        gcsSourceBuilder_.mergeFrom(value);
      }
      if (gcsSource_ != null) {
        bitField0_ |= 0x00000001;
        onChanged();
      }
      return this;
    }
<pre>
The Google Cloud Storage location to read the input from.
</pre>

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