code: protected void initMojoMultiValueParameters() {
  
  		// Set default values for 'checkFileSets' to "src/main/resources/*.btdesign"
  		if (checkFileSets == null) {
  			FileSet defaultFileSet = new FileSet();
  			defaultFileSet.setDirectory(project.getBasedir() + "/src/main/resources");
  			defaultFileSet.addInclude("*.btdesign");
  			checkFileSets = new FileSet[] { defaultFileSet };
  		}
  	}
docs: Initialize default values for the multi-value Mojo parameter
  <code>checkFileSets</code>.