docs: @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;
  	}