addAll(property, amount, checkAlive, checkVisible)
Adds the amount to the given property on all children in this group.
Group.addAll('x', 10) will add 10 to the child.x value for each child.
Parameters
| Name | Type | Description | 
|---|---|---|
property |  string | The property to increment, for example 'body.velocity.x' or 'angle'.  |  
amount |  number | The amount to increment the property by. If child.x = 10 then addAll('x', 40) would make child.x = 50.  |  
checkAlive |  boolean | If true the property will only be changed if the child is alive.  |  
checkVisible |  boolean | If true the property will only be changed if the child is visible.  |  
- Inherited From
 - Source code: core/Group.js (Line 1386)
 
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