@java.lang.Override
    public java.lang.String getInputStreamsMappingOrThrow(java.lang.String key) {
      if (key == null) {
        throw new NullPointerException("map key");
      }
      java.util.Map<java.lang.String, java.lang.String> map =
          internalGetInputStreamsMapping().getMap();
      if (!map.containsKey(key)) {
        throw new java.lang.IllegalArgumentException();
      }
      return map.get(key);
    }
<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