d.putBoolean( s2t("makeVisible" ), false ); The layer is not hidden?

[RedButNoDead]

There is a piece of code that selects a layer:

.....

r.putName( s2t( "layer" ), "My layer" );
d.putReference( c2t( "null" ),r );

d.putBoolean( s2t("makeVisible" ), false );

.....
Why does d.putBoolean( s2t("makeVisible" ), false ); not hide the layer.
If I write:
d.putBoolean( s2t("makeVisible" ), true );
The layer from invisible becomes visible.
If I write:

d.putBoolean( s2t("makeVisible" ), false );
The layer is not hidden?
Could this be a feature of my version of Photoshop, or am I misunderstanding something?

[c.pfaffenbichler]

Edit: It is called »makeVisible«, so if the Layer is already visible it would seem reasonable to have no effect either way. 

Selecting a Layer is simply not intended to hide it, to hide a Layer one need not select it. 

[RedButNoDead]

Thank you. I thought if you can apply the true, then it makes sense that you can try on a false. 

[c.pfaffenbichler]

But that only makes a difference if the Layer is currently hidden. 

If you want to hide a Layer there is no need to select it. 

What is the workflow in which this needs to be included? 

[RedButNoDead]

This is for theory at the moment. For practice, I found a code through the listener that hides and shows the desired layer.

It's interesting to understand the processes that I don't understand.