ParticleSystem.main: No Setter Methods

GetComponent<ParticleSystem>().startSize throws a warning:
Warning CS0618 'ParticleSystem.startSize' is obsolete: 'startSize property is deprecated.Use main.startSize or main.startSizeMultiplier instead.'

The documentation says I can set values of main:
https://docs.unity3d.com/2018.2/Doc...ence/ParticleSystem.MainModule-startSize.html

However, ParticleSystem.main does not have any setter methods:


As such, I cannot resolve the warnings because I cannot Use main.startSize or main.startSizeMultiplier instead.

 

var glowMain = glow.main;
glowMain.startSize = 10;