Use delomboked sources for javadoc generation

pom.xml

@@ -200,6 +200,30 @@
 				<artifactId>maven-release-plugin</artifactId>
 				<version>2.5.3</version>
 			</plugin>
+			<plugin>
+				<groupId>org.projectlombok</groupId>
+				<artifactId>lombok-maven-plugin</artifactId>
+				<version>1.18.16.0</version>
+				<configuration>
+					<!-- Delomboked sources are only used for javadoc generation, and can be
+					skipped when javadoc is not being run. -->
+					<skip>${maven.javadoc.skip}</skip>
+					<sourceDirectory>${project.basedir}/src/main/java</sourceDirectory>
+					<!-- The default output directory is in generated-sources, which is
+					treated as a source root, even with addOutputDirectory false. So,
+					place it in top level build directory instead. -->
+					<outputDirectory>${project.build.directory}/delombok</outputDirectory>
+					<addOutputDirectory>false</addOutputDirectory>
+				</configuration>
+				<executions>
+					<execution>
+						<phase>generate-sources</phase>
+						<goals>
+							<goal>delombok</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-javadoc-plugin</artifactId>
@@ -209,6 +233,8 @@
 					<source>8</source>
 					<!-- Fix Javadoc search feature to work without modules - https://stackoverflow.com/a/52603413 -->
 					<additionalJOption>--no-module-directories</additionalJOption>
+					<!-- Javadoc the delombok sources -->
+					<sourcepath>${project.build.directory}/delombok</sourcepath>
 				</configuration>
 				<!-- maven-release-plugin runs maven-javadoc-plugin:jar as one of its
 				     release steps, so we will run it as well for the CI. Note this