} else if (isTryEnter(method)) {
      assertFalse(desc, isTimed(method));
      assertTrue(desc, isBoolean(method));
      assertFalse(desc, isInterruptible(method));
    } else if (isWaitFor(method)) {
      assertTrue(desc, isGuarded(method));
      assertEquals(desc, isTimed(method), isBoolean(method));
    } else { // any other enterXxx method
      assertEquals(desc, isTimed(method), isBoolean(method));
    }
  }

@argument {Element} customContainer\n * @returns {Boolean} answer to \"isFixed?\"\n */\nexport default function isFixed(element) {\n  const nodeName = element.nodeName;\n  if (nodeName === 'BODY' || nodeName === 'HTML') {\n    return false;\n  }\n  if (getStyleComputedProperty(element, 'position') === 'fixed') {\n    return true;\n  }\n  const parentNode = getParentNode(element);\n  if (!parentNode) {\n    return false;\n  }\n  return isFixed(parentNode);\n}\n","import getStyleComputedProperty from './ge...