code: @Nullable
      private Method getLambdaMethod(String methodName) {
          for (Method method : currentClass.getMethods()) {
              if (methodName.equals(method.getName())) {
                  return method;
              }
          }
  
          return null;
      }
docs: finds the bootstrap method for a lambda (invokedynamic call. As findbugs doesn't support bcel 6, have to cheat a little here.
  
  @param methodName
  the lambda name
  @return the method object if it exists