code: @Pure
  	DBaseFileAttributeAccessor getAccessor(int recordNumber) {
  		DBaseFileAttributeAccessor accessor = this.accessors.get(recordNumber);
  		if (accessor == null) {
  			accessor = new DBaseFileAttributeAccessor(this, recordNumber);
  			this.accessors.put(recordNumber, accessor);
  		}
  		return accessor;
  	}
docs: Replies the attribute accessor associated to the specified
  record number.
  
  @param recordNumber is the number of the record for which an accessor may be obtainable.
  @return the accessor to the record at the given position.