Looks like this is being used as the default horizontal spacer size? Probably to get around the fact that we only want these defaults in the vertical or horizontal position, not at the same time.  ```  "attributes": {  \t\t"height": {\t\t\t  \t\t\t"type": "number",\t\t\t  \t\t\t"default": 100\t\t\t\t  \t\t},  \t\t"width": {  \t\t\t"type": "number"  \t\t}\t\t\t}  ```    Would it be possible to move the magic numbers to a named constant?