local code c = donothing() // главное что DoNothing
call c

function a takse code c returns nothing
endfunction

function b takes nothing returns nothing
 call a(function DoNothing)
endfunction

local string c="DoNothing"
call ExecuteFunc(c)

native IsTerrainPathable takes real x, real y, pathingtype t returns boolean

// Вариант из БЖ (в точке):
function IsTerrainPathableBJ takes location where, pathingtype t returns boolean
  return IsTerrainPathable(GetLocationX(where), GetLocationY(where), t)
endfunction