in client/src/main/java/co/elastic/opamp/client/internal/OpampClientImpl.java [221:227]
public Request get() {
Opamp.AgentToServer.Builder builder = Opamp.AgentToServer.newBuilder();
for (FieldType field : recipeManager.next().build().getFields()) {
appenders.getForField(field).appendTo(builder);
}
return Request.create(builder.build());
}