Are 'LearningTrail.xml' files allowed in the Swift Student Challenge submission?

I noticed that some of the built-in playgrounds have a file called LearningTrail.xml, with contents that look like this:

Code Block 
<?xml version="1.0" encoding="UTF-8"?>
<trail version="1.1" name="0103">
  <steps>
    <step type="context">
      <blocks>
        <block type="title">
          <title id="MfZ-Gx-dNg">What’s An Action?</title>
        </block>
        <block type="image" source="content-whats-an-action" height="0.75">
          <description id="AcK-pe-jkX">A snail with four circles above it, showing the snail can scale, move forward and back, rotate, and fade in and out.</description>
        </block>
        <block type="text">
          <text id="jYg-QZ-KMx">In addition to animations, you can also scale, move, rotate, and fade your models using actions.</text>
        </block>
        
        <block type="buttons" alignment="trailing">
          <button href="@nextStep" symbol="arrow.right.circle.fill">
            <text id="BMD-jU-Xiz">Ready?</text>
          </button>
        </block>
      </blocks>
    </step>
... lots more

The result looks like this: image link

I can't find any documentation on this... will this be considered a private API? Are we allowed to make our own LearningTrail for our Swift Student Challenge submission?