code: function isNative (val) {
    if (isPrimitive(val)) {
      return true
    }
    return natives.some(function (Class) {
      return val === Class || directInstanceOf(val, Class)
    })
  }
docs: returns if a value is an instance of native type
  @param  ctx.{*}  ctx.val  ctx.value to check if is native
  @return {Boolean}  ctx.true if val is native, else false