objectStyle(itemOrName, [props])
Returns the object style of a given page item or the object style with the given name. If an object style of the given name does not exist, it gets created. Optionally a props object of property name/value pairs can be used to set the object style’s properties.
Type: function
Parameter(s):
- itemOrName {PageItem | String}:A page item whose style to return or the name of the object style to return. 
- props {Object} Optional:An object of property name/value pairs to set the style’s properties. 
Returns:
- 
    {ObjectStyle}:
 The object style instance.