Remove Keys and Children from config.yml

I am having problems removing a key and its children from my config.yml

Hypothetically, lets say the config looks like this:

Code:

Warps:
    Warp1:
        x:
        y:
        z:
        pitch:
        yaw:
        world:
        owner:
    Warp2:
        x:
        y:
        z:
        pitch:
        yaw:
        world:
        owner:

How, if I input a command, would I go about removing Warp1? I have tried making it a List<String> but that messes things up.

I have tried:

Code:java

plugin.getConfig().getConfigurationSection("Warps").set(args[0], null)

That removes it from the server while its running. but it doesn't remove it from the config.yml.
Is there a step that I am missing?
Is there an easier way to handle the data?

Any help is appreciated.
Thanks

 

You might forgot to save the file because it got removed in the cached config but not in the corresponding file.

 

... I should have thought of that. Guess it took on stroke of stupidity on my part to finally understand how keys work and how to use them.

Thank you