subAll(property, amount, checkAlive, checkVisible)
Subtracts the amount from the given property on all children in this group.
Group.subAll('x', 10) will minus 10 from the child.x value for each child.
Parameters
| Name | Type | Description | 
|---|---|---|
property |  string | The property to decrement, for example 'body.velocity.x' or 'angle'.  |  
amount |  number | The amount to subtract from the property. If child.x = 50 then subAll('x', 40) would make child.x = 10.  |  
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 1403)
 
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