@java.lang.Override
  public int hashCode() {
    if (memoizedHashCode != 0) {
      return memoizedHashCode;
    }
    int hash = 41;
    hash = (19 * hash) + getDescriptor().hashCode();
    hash = (37 * hash) + MODE_FIELD_NUMBER;
    hash = (53 * hash) + mode_;
    if (getAllowedFunctionNamesCount() > 0) {
      hash = (37 * hash) + ALLOWED_FUNCTION_NAMES_FIELD_NUMBER;
      hash = (53 * hash) + getAllowedFunctionNamesList().hashCode();
    }
    hash = (29 * hash) + getUnknownFields().hashCode();
    memoizedHashCode = hash;
    return hash;
  }
<pre>
Optional. Function names to call. Only set when the Mode is ANY. Function
names should match [FunctionDeclaration.name]. With mode set to ANY, model
will predict a function call from the set of function names provided.
</pre>

<code>repeated string allowed_function_names = 2 [(.google.api.field_behavior) = OPTIONAL];
</code>

@param index The index of the value to return.
@return The bytes of the allowedFunctionNames at the given index.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/FunctionCallingConfig.java