public Builder setDisplayName(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      displayName_ = value;
      bitField0_ |= 0x00000008;
      onChanged();
      return this;
    }
<pre>
Optional. Immutable. The user-generated meaningful display name of the
cached content.
</pre>

<code>
string display_name = 11 [(.google.api.field_behavior) = OPTIONAL, (.google.api.field_behavior) = IMMUTABLE];
</code>

@param value The displayName to set.
@return This builder for chaining.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/CachedContent.java