code: public static ImmutableMap<String, Object> prepareArguments(String param,
                                                                  Object value) {
          ImmutableMap.Builder<String, Object> builder = ImmutableMap.builder();
          builder.put(param, value);
          return builder.build();
      }
docs: Prepares single argument.
  
  @param param is a parameter name.
  @param value is the parameter value.
  @return built {@link ImmutableMap}.