public void append(StringConcatenation concat, String indentation) {
		if (indentation.isEmpty()) {
			append(concat);
		} else if (concat != null)
			appendSegments(indentation, segments.size(), concat.getSignificantContent(), concat.lineDelimiter);
	}
public void append ( StringConcatenation concat , String indentation ) { if ( indentation . isEmpty ( ) ) { append ( concat ) ; } else if ( concat != null ) appendSegments ( indentation , segments . size ( ) , concat . getSignificantContent ( ) , concat . lineDelimiter ) ; }
Append the contents of a given StringConcatenation to this sequence. Does nothing
if the concatenation is <code>null</code>. The given indentation will be prepended to each line except
the first one.

@param concat
the to-be-appended StringConcatenation.
@param indentation
the indentation string that should be prepended. May not be <code>null</code>.
@since 2.11