Let say you have multiple groups existing of line segments and filled objects (lines and circles for example). If I want to change the color of the lines and objects of a group, by clicking on a group, that is not possible. Or all line segments get a fill too or all the objects get a line too.  

To fix this, I have to go inside the group, select all the objects, change the fill and then select all the line segments and change the line color.  

A button to change the color of all line segments and the color of all object fills of a group (in one color) at once, that would be awesome.  

For everybody out there maintaining icon libraries for example, this would be a massive time saving feature.  

If this feature is already there please let me know!