docs: private Set<String> getColumnsOfEmbeddableAndComputeEmbeddableNullness(String embeddable) {
  		Set<String> columnsOfEmbeddable = new HashSet<String>();
  		boolean hasOnlyNullColumns = true;
  
  		for ( String selectableColumn : columns ) {
  			if ( !isColumnPartOfEmbeddable( embeddable, selectableColumn ) ) {
  				continue;
  			}
  
  			columnsOfEmbeddable.add( selectableColumn );
  
  			if ( hasOnlyNullColumns && tuple.get( selectableColumn ) != null ) {
  				hasOnlyNullColumns = false;
  			}
  		}
  
  		if ( hasOnlyNullColumns ) {
  			nullEmbeddables.add( embeddable );
  		}
  
  		return columnsOfEmbeddable;
  	}