org.openapitools.client.JSON cannot be resolved

[homebeaver]

The import org.openapitools.client.JSON cannot be resolved. In java sources, f.i. in AisStreamMessage :

import org.openapitools.client.JSON;

/**
 * AisStreamMessage
 */
@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen", date = "2023-06-27T20:57:25.293422-07:00[America/Vancouver]")
public class AisStreamMessage {

where to find the appropriate lib?