docs: public static void addDeclaredMethodsFromInterfaces(ClassNode cNode, Map<String, MethodNode> methodsMap) {
          // add in unimplemented abstract methods from the interfaces
          for (ClassNode iface : cNode.getInterfaces()) {
              Map<String, MethodNode> ifaceMethodsMap = iface.getDeclaredMethodsMap();
              for (Map.Entry<String, MethodNode> entry : ifaceMethodsMap.entrySet()) {
                  String methSig = entry.getKey();
                  if (!methodsMap.containsKey(methSig)) {
                      methodsMap.put(methSig, entry.getValue());
                  }
              }
          }
      }