====== SetTimeVanishingSpeed ======


  * Parameters & Types:
     * speed: number skybox time
  * Return value and type:
     * code:number succeeded (ErrorCode.OK) ErrorCode
  * The main purpose of this method: Set the skybox time lapse velocity
  * Specific use cases are as follows:

<code>
local code  = World:SetTimeVanishingSpeed(speed)
if code == ErrorCode.OK then
    print('Execution Successful'  )
else
    print('Execution failed')
end
</code>