private com.google.protobuf.MapField<java.lang.String, java.lang.String>
      internalGetOutputStreamsMapping() {
    if (outputStreamsMapping_ == null) {
      return com.google.protobuf.MapField.emptyMapField(
          OutputStreamsMappingDefaultEntryHolder.defaultEntry);
    }
    return outputStreamsMapping_;
  }
<pre>
Map from the input parameter in the definition to the real stream.
E.g., suppose you had a stream source operator named "input-0" and you try
to receive from the real stream "stream-0". You can add the following
mapping: [input-0: stream-0].
</pre>

<code>map&lt;string, string&gt; input_streams_mapping = 6;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/Analysis.java