WIP making ColumnDataHolder mutable, so it can work as DataCollector. Using fastutils classes for this.

Author: Jolanrensen

core/build.gradle.kts

@@ -84,6 +84,7 @@ dependencies {
     testImplementation(libs.jsoup)
 
     testImplementation("org.openjdk.jol:jol-core:0.10")
+    implementation("it.unimi.dsi:fastutil:8.5.14")
 }
 
 val samplesImplementation by configurations.getting {

core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/ColumnDataHolder.kt

@@ -25,7 +25,7 @@ import kotlin.reflect.typeOf
  * Represents the contents of a column; however, it may be implemented.
  * The default implementation is found at [ColumnDataHolderImpl].
  */
-public interface ColumnDataHolder<T> : List<T> {
+public interface ColumnDataHolder<T> : /*Mutable*/ List<T> {
 
     public fun toSet(): Set<T>