@Override
  protected ExecutionStrategy getExecutionStrategy() {
    return executionStrategy;
  }
Returns the {@link ExecutionStrategy} implementation used by this implementation of
{@link AbstractShell}. {@link Gfsh} uses {@link GfshExecutionStrategy}.

@return ExecutionStrategy used by Gfsh
geode-gfsh/src/main/java/org/apache/geode/management/internal/cli/shell/Gfsh.java