private void ensureDenyIsMutable() {
      if (!deny_.isModifiable()) {
        deny_ = new com.google.protobuf.LazyStringArrayList(deny_);
      }
      bitField0_ |= 0x00000004;
    }
<pre>
The list of allowed tags.
</pre>

<code>repeated string allow = 2;</code>

@param value The bytes of the allow to add.
@return This builder for chaining.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/ExamplesRestrictionsNamespace.java