fun addImport(constant: Enum<*>): FileSpec.Builderfun addImport(class: Class<*>, vararg names: String): FileSpec.Builderfun addImport(class: KClass<*>, vararg names: String): FileSpec.Builderfun addImport(className: ClassName, vararg names: String): FileSpec.Builderfun addImport(packageName: String, vararg names: String): FileSpec.Builder