diff --git a/csv-core/src/main/scala/org/bitlap/csv/core/Scalable.scala b/csv-core/src/main/scala/org/bitlap/csv/core/Scalable.scala
index 9d60b27a1c058cc00d03dbb9aaf65f4b264c677b..ecb5dbf081a2a7578da6941c8f88cdf84632d3b2 100644
--- a/csv-core/src/main/scala/org/bitlap/csv/core/Scalable.scala
+++ b/csv-core/src/main/scala/org/bitlap/csv/core/Scalable.scala
@@ -31,7 +31,7 @@ package org.bitlap.csv.core
 trait Scalable[T] {
 
   @InternalApi
-  def _toScala(line: String): Option[T] = None
+  def _toScala(column: String): Option[T] = None
 
   def toScala: Option[T] = None
 }
diff --git a/csv-core/src/test/scala/org/bitlap/csv/core/test/CsvableAndScalableTest.scala b/csv-core/src/test/scala/org/bitlap/csv/core/test/CsvableAndScalableTest.scala
index 8367d97d23b99dd9803fd70f38480f04d210c714..23cd287aa5ff72e77861e8d50b34f3651ca6ad71 100644
--- a/csv-core/src/test/scala/org/bitlap/csv/core/test/CsvableAndScalableTest.scala
+++ b/csv-core/src/test/scala/org/bitlap/csv/core/test/CsvableAndScalableTest.scala
@@ -158,7 +158,6 @@ class CsvableAndScalableTest extends AnyFlatSpec with Matchers {
     }
 
     println(metrics)
-
     assert(metrics.head.get.dimensions.head.key == "city")
     assert(metrics.head.get.dimensions.head.value == "北京")
   }