@CliCommand(value = CREATE_MOCK_CACHE_EXTENSION)
  @ResourceOperation(resource = Resource.CLUSTER, operation = Operation.READ)
  public Result createMockCacheExtension(
      @CliOption(key = OPTION_VALUE, mandatory = true) final String value) {
    return executeFunctionOnAllMembersTabulateResultPersist(
        CreateMockCacheExtensionFunction.INSTANCE, true,
        CreateMockCacheExtensionFunction.toArgs(value));
  }
Creates a {@link MockCacheExtension}.

@param value {@link String} value to set on {@link MockCacheExtension#setValue(String)}.
@return {@link Result}
@since GemFire 8.1
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/extension/mock/MockExtensionCommands.java