How to use the @aurelia/runtime-html.HTMLTargetedInstructionType.stylePropertyBinding function in @aurelia/runtime-html

[
          [
            TargetedInstructionType.callBinding,
            TargetedInstructionType.hydrateAttribute,
            TargetedInstructionType.hydrateElement,
            TargetedInstructionType.hydrateLetElement,
            TargetedInstructionType.hydrateTemplateController,
            TargetedInstructionType.interpolation,
            TargetedInstructionType.iteratorBinding,
            TargetedInstructionType.letBinding,
            TargetedInstructionType.propertyBinding,
            TargetedInstructionType.refBinding,
            TargetedInstructionType.setProperty,
            HTMLTargetedInstructionType.listenerBinding,
            HTMLTargetedInstructionType.setAttribute,
            HTMLTargetedInstructionType.stylePropertyBinding,
            HTMLTargetedInstructionType.textBinding
          ]
        ],
        t => {
        it(`understands targeted instruction type=${t}`, function () {
          const ctx = TestContext.createHTMLTestContext();
          //@ts-ignore
          const actual = sut(ctx.dom, tag, { prop: { type: t }});

          const instruction = actual['instructions'][0][0] as TargetedInstruction;
          const node = actual['node'] as Element;

          assert.strictEqual(actual['instructions'].length, 1, `actual['instructions'].length`);
          assert.strictEqual(actual['instructions'][0].length, 1, `actual['instructions'][0].length`);
          assert.strictEqual(instruction.type, t, `instruction.type`);
          assert.strictEqual(node.getAttribute('class'), 'au', `node.getAttribute('class')`);

switch (type) {
    case HTMLTargetedInstructionType.textBinding:
      return 'textBinding';
    case TargetedInstructionType.interpolation:
      return 'interpolation';
    case TargetedInstructionType.propertyBinding:
      return 'propertyBinding';
    case TargetedInstructionType.iteratorBinding:
      return 'iteratorBinding';
    case HTMLTargetedInstructionType.listenerBinding:
      return 'listenerBinding';
    case TargetedInstructionType.callBinding:
      return 'callBinding';
    case TargetedInstructionType.refBinding:
      return 'refBinding';
    case HTMLTargetedInstructionType.stylePropertyBinding:
      return 'stylePropertyBinding';
    case TargetedInstructionType.setProperty:
      return 'setProperty';
    case HTMLTargetedInstructionType.setAttribute:
      return 'setAttribute';
    case TargetedInstructionType.hydrateElement:
      return 'hydrateElement';
    case TargetedInstructionType.hydrateAttribute:
      return 'hydrateAttribute';
    case TargetedInstructionType.hydrateTemplateController:
      return 'hydrateTemplateController';
    case TargetedInstructionType.hydrateLetElement:
      return 'hydrateLetElement';
    case TargetedInstructionType.letBinding:
      return 'letBinding';
    default:

case TargetedInstructionType.callBinding:
      output += 'callBinding\n';
      break;
    case TargetedInstructionType.iteratorBinding:
      output += 'iteratorBinding\n';
      break;
    case HTMLTargetedInstructionType.listenerBinding:
      output += 'listenerBinding\n';
      break;
    case TargetedInstructionType.propertyBinding:
      output += 'propertyBinding\n';
      break;
    case TargetedInstructionType.refBinding:
      output += 'refBinding\n';
      break;
    case HTMLTargetedInstructionType.stylePropertyBinding:
      output += 'stylePropertyBinding\n';
      break;
    case TargetedInstructionType.setProperty:
      output += 'setProperty\n';
      break;
    case HTMLTargetedInstructionType.setAttribute:
      output += 'setAttribute\n';
      break;
    case TargetedInstructionType.interpolation:
      output += 'interpolation\n';
      break;
    case TargetedInstructionType.hydrateLetElement:
      output += 'hydrateLetElement\n';
      instruction.instructions.forEach(i => {
        output += stringifyInstructions(i, depth + 1);
      });

case TargetedInstructionType.callBinding:
      output += 'callBinding\n';
      break;
    case TargetedInstructionType.iteratorBinding:
      output += 'iteratorBinding\n';
      break;
    case HTMLTargetedInstructionType.listenerBinding:
      output += 'listenerBinding\n';
      break;
    case TargetedInstructionType.propertyBinding:
      output += 'propertyBinding\n';
      break;
    case TargetedInstructionType.refBinding:
      output += 'refBinding\n';
      break;
    case HTMLTargetedInstructionType.stylePropertyBinding:
      output += 'stylePropertyBinding\n';
      break;
    case TargetedInstructionType.setProperty:
      output += 'setProperty\n';
      break;
    case HTMLTargetedInstructionType.setAttribute:
      output += 'setAttribute\n';
      break;
    case TargetedInstructionType.interpolation:
      output += 'interpolation\n';
      break;
    case TargetedInstructionType.hydrateLetElement:
      output += 'hydrateLetElement\n';
      instruction.instructions.forEach(i => {
        output += stringifyInstructions(i, depth + 1);
      });