How do I add an action to a folder?

Add to your layer:

<folder name="Loaders">
  <folder name="folder">
    <folder name="any">
      <folder name="Actions">
        <file name="org-mymodule-MyAction.instance"/>
      </folder>
    </folder>
  </folder>
</folder>

See also:

• How do I add an action to a file of a given mime-type?
• How do I add an action to the text-editor popup menu?
• How do I add an action to the NetBeans menu bar?
• How do I add an action to the NetBeans tool bar?
• How do I add an action to my custom node?