When code cannot parse what type is variable holding, it must be specified manualy

示例：

  var int_val = 1
  val string_val = ""

在应用快速修复后：

  var int_val: int = 1
  val string_val: String = ""

Or when short option is used:

  var int_val := 1
  val string_val := ""

Since 1.1.0