method EnemyCond takes nothing returns boolean
return IsPlayerEnemy(GetOwningPlayer(GetEnumUnit()), Player(this.gid))
endmethod

method GetEnum takes real x,real y,real radius returns nothing
 call GroupEnumUnitsInRange(this.g, x,y, radius,this.EnemyCond)
endmethod

boolexpr b = Condition(function this.EnemyCond)
GroupEnumUnitsInRange(this.g, x,y, radius,b)

struct data {

private static bool for_group() {
	//...
}

void explode() {
	//...
	GroupEnumUnitsInRange(g,this.x,this.y,AreaOfEffect,Condition(function data.for_group))
	//...
}

}