docs: protected void markStatementsForInsertion(
  			StatementDocument currentDocument, List<Statement> addStatements) {
  		for (Statement statement : addStatements) {
  			addStatement(statement, true);
  		}
  
  		for (StatementGroup sg : currentDocument.getStatementGroups()) {
  			if (this.toKeep.containsKey(sg.getProperty())) {
  				for (Statement statement : sg) {
  					if (!this.toDelete.contains(statement.getStatementId())) {
  						addStatement(statement, false);
  					}
  				}
  			}
  		}
  	}