Вопрос по коду

scope DeadlyLink
//=====================================vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv==========================================
private struct DeadlyLinkX
      
      group groupxx
      trigger damagetrg
     static method OnDamage takes nothing returns nothing
              
                   local unit  source =GetEventDamageSource()
                   local unit target = BlzGetEventDamageTarget()

      
    call KillUnit(target)         
     
 
          set source = null
          set target = null

        endmethod

    



       static method Dmg takes group g returns thistype
               local thistype this = thistype.allocate()
                local integer i = 0
                local unit u
                local integer size  = 0
        
			    set this.groupxx = g
				set this.damagetrg = CreateTrigger()

  
          call TriggerRegisterUnitEvent(this.damagetrg,BlzGroupUnitAt(this.groupxx, 0) , EVENT_UNIT_DAMAGED)
    
         set size = BlzGroupGetSize(this.groupxx)
            if size > -1 then
                loop
                   exitwhen i == size
                       set u =  BlzGroupUnitAt(this.groupxx, i)
              call TriggerRegisterUnitEvent(this.damagetrg, u , EVENT_UNIT_DAMAGED)
              set i = i + 1
            endloop
           endif

          call TriggerAddAction(this.damagetrg, function thistype.OnDamage)
        
			 set u = null
             set g = null			 
 
                return this
            endmethod
      endstruct      
//=========================================^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^==============================================
    private struct DeadlyLink extends Missiles
    
      integer charge
      group group2
      
    

        method onFinish takes nothing returns boolean
            local unit u
            local group grp = CreateGroup()
            local group grp2 = CreateGroup()
            local DeadlyLink mssl
            local unit source2 = source
            local group g = CreateGroup()

   
if charge > 0 then

  call GroupEnumUnitsInRange(grp, GetUnitX(target), GetUnitY(target), 500, null)
         

             loop
                    set u = FirstOfGroup(grp)
                    exitwhen u == null
                if IsUnitInGroup(u, group2) == false and IsUnitEnemy(u, GetOwningPlayer(source)) and UnitAlive(u)  and u != target  and BlzIsUnitInvulnerable(u) == false and not IsUnitType(u, UNIT_TYPE_STRUCTURE) then
 
                      call GroupAddUnit(grp2,u)
                 endif
                    call GroupRemoveUnit(grp, u)
                endloop
                  call DestroyGroup(grp)
                  set grp = null  
             
             
            if  CountUnitsInGroup(grp2) > 0 then
                    set u =  GroupPickRandomUnit(grp2)
                    set mssl = DeadlyLink.create(GetUnitX(target), GetUnitY(target), 60, GetUnitX(u), GetUnitY(u), 60)
                        set mssl.model  = "Abilities\\Spells\\Items\\OrbCorruption\\OrbCorruptionMissile.mdl"
                        set mssl.speed  = 1500
                        set mssl.target = u
                        set mssl.source = source2
                        set mssl.scale = 1
                        set mssl.charge = charge - 1
                        set mssl.group2 = CreateGroup()
                        call GroupAddGroup(group2,mssl.group2)
                        call GroupAddUnit(mssl.group2,u)
                        call mssl.launch()      
            endif
            
else
 
                   set g = group2                      
                   call DeadlyLinkX.Dmg(g)              //ВОТ ТУТ Я ТИПО ПЕРЕДАЮ ИНФУ В ВЕРХНЮЮ СТРУКТУРУ DeadlylinkX 
  
                  
 endif
                  
                        call DestroyGroup(grp2)
                        call DestroyGroup(group2)
                        set grp2 = null    
                        set u = null
                        set source2 = null
                        set group2 = null
						set g = null
                        
            return false
            

        endmethod
   endstruct 

 private struct Start
 
 
        static method onCast takes nothing returns nothing
            local DeadlyLink mssl
            local unit caster = GetSpellAbilityUnit()
            
         
                        set mssl = DeadlyLink.create(Spell.source.x, Spell.source.y, 85, GetUnitX(Spell.target.unit), GetUnitY(Spell.target.unit), 85)
                        set mssl.model  = "Abilities\\Spells\\Items\\OrbCorruption\\OrbCorruptionMissile.mdl"
                        set mssl.speed  = 1500
                        set mssl.target = Spell.target.unit
                        set mssl.scale =  1
                        set mssl.charge = 5
                        set mssl.source = caster
                        set mssl.group2 = CreateGroup()
                        call GroupAddUnit(mssl.group2,Spell.target.unit)
                       	call mssl.launch()
						
              set caster = null
        endmethod

        static method onInit takes nothing returns nothing
            call RegisterSpellEffectEvent('A03E', function thistype.onCast)
        endmethod
    endstruct
endscope