Правильно ли очередь текстов функции?

function Trig_SmokeOfDeceit_Actions takes unit a returns nothing
local group g = CreateGroup()
local unit e 
local unit r
call GroupEnumUnitsInRange(g,GetUnitX(a),GetUnitY(a),900.,null)
loop
set e = FirstOfGroup(g)
if IsUnitEnemy(e, GetOwningPlayer(a)) == false and IsUnitType(e,UNIT_TYPE_DEAD) == false and IsUnitType(e,UNIT_TYPE_HERO) == true and IsUnitType(e,UNIT_TYPE_STRUCTURE) == false then
set r = CreateUnit(GetOwningPlayer(e),'e110',GetUnitX(e), GetUnitY(e), 0)
call UnitApplyTimedLife( r, 'BTLF', 1 )
call UnitAddAbility(r,'A505') 
call IssueTargetOrder( r, "invisibility", e )
endif
call GroupRemoveUnit(g,e)
exitwhen e ==null
endloop
call DestroyGroup(g)
set g = null
set a = null
set e = null
set r = null
endfunction