function blablabla returns thistype

...

struct omfg
  static integer c = 0
  integer i
  static method create takes nothing returns thistype
    local thistype this = thistype.allocate()
    set c = c + 1
    set .i = c
    return this
  endmethod
endstruct

// идентично этому:

struct omfg
  static integer c = 0
  integer i
  static method create takes nothing returns omfg
    local omfg this = omfg.allocate()
    set c = c + 1
    set this.i = c
    return this
  endmethod
endstruct