https://github.com/vmzakharov/dataframe-ec: A tabular data structure based on the Eclipse Collections framework
  • Vladimir Zakharov 
package io.github.vmzakharov.ecdataframe.dataframe;

public interface DfColumnStored
extends DfColumn
{
    @Override
    default boolean isStored() { return true; }

    void ensureCapacity(int newCapacity);
}