Auto-generate ResultMap body

Would be really cool if I could write smth like: 

```
<resultMap id="x" type="com.example.x">
</resultMap> 
```
click Alt-Ins, select "results based on type"
and `resultMap` would get filled like 

```
<resultMap id="x" type="com.example.x">
 <result property="prop1" column=""/>
 <result property="prop2" column=""/>
 <result property="prop3" column=""/>
</resultMap> 
```
