138   private final Optional<ComponentImplementation> shardOwner;  field in ComponentImplementation
169     this.shardOwner = Optional.empty();  in ComponentImplementation()
174   private ComponentImplementation(ComponentImplementation shardOwner, ClassName shardName) {  in ComponentImplementation()  argument
175     this.graph = shardOwner.graph;  in ComponentImplementation()
178     this.subcomponentNames = shardOwner.subcomponentNames;  in ComponentImplementation()
179     this.compilerOptions = shardOwner.compilerOptions;  in ComponentImplementation()
180     this.shardOwner = Optional.of(shardOwner);  in ComponentImplementation()
182     String uniqueFieldName = shardOwner.getUniqueFieldName(fieldName);  in ComponentImplementation()
183     this.externalReferenceBlock = CodeBlock.of("$T.this.$N", shardOwner.name, uniqueFieldName);  in ComponentImplementation()
184     shardOwner.addTypeSupplier(() -> generate().build());  in ComponentImplementation()
185     shardOwner.addField(  in ComponentImplementation()
203     checkState(!shardOwner.isPresent(), "Shards cannot create child components.");  in childComponentImplementation()
210     checkState(!shardOwner.isPresent(), "Shards cannot create other shards.");  in shardImplementation()