code: package it.unibz.inf.data_pumper.columns_cluster;
  
  import java.util.List;
  
  import it.unibz.inf.data_pumper.columns.ColumnPumper;
  
  public abstract class ColumnsCluster<T> {
   
      // Public
      public abstract boolean hasMultiInterval();
      public abstract void classicStrategy() ;
      public abstract List<ColumnPumper<T>> getColumnPumpersInCluster();
      public abstract void adaptIntervalsFromMultiIntervalCols();
      
      // Protected
      protected abstract List<ColumnPumperInCluster<T>> getClusterCols();
      
      // Package
      abstract void registerColumnPumper(ColumnPumper<T> cP);
      abstract ColumnPumperInCluster<T> getColumnPumperInClusterWrapping(ColumnPumper<T> cP); 
  }
  