@Override
  public String toString() {
    return new ToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE).appendSuper(toShortString())
      .append("param", param != null ? ProtobufUtil.getShortTextFormat(param) : "").toString();
  }
Builds a simplified {@link #toString()} that includes just the id and method name.
hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/Call.java