My custome locator won't list its type in MEL

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I want to use mel to list how many locators (of my own type) are in my scene.

I've tried: listNodeType "myCustomLocator" and it returns nothing.

I've tried: nodeType "myCustomeLocator1" and it returns nothing

I've also tried: objectType blahblah
and I get nothing.

Also, I am unable to override the locators color in the attribute editor.

Has this happened to anyone else?