FredBoards settings

[Jan Kašpar]

Hello,

at this documentation page:
  
http://www.lilypond.org/doc/v2.17/Documentation/notation/common-notation-for-fretted-strings
I've found this snippet:

\include "predefined-guitar-fretboards.ly"

<<
  \new FretBoards {
    % Set global properties of fret diagram
    \override FretBoards.FretBoard.size = #'1.2
    \override FretBoard.fret-diagram-details.finger-code = #'in-dot
    \override FretBoard.fret-diagram-details.dot-color = #'white
    \chordmode {
      c
    }
  }
>>

Which unfortunately doesn't work for me:

GNU LilyPond 2.16.2
Processing `chords3.ly'
Parsing...
chords3.ly:6:34: error: syntax error, unexpected '.', expecting
SCM_FUNCTION or SCM_IDENTIFIER or SCM_TOKEN
    \override FretBoards.FretBoard
                                  .size = #'1.2
chords3.ly:6:42: warning: Ignoring non-music expression
    \override FretBoards.FretBoard.size =
                                          #'1.2
chords3.ly:7:44: error: syntax error, unexpected '.', expecting
SCM_FUNCTION or SCM_IDENTIFIER or SCM_TOKEN
    \override FretBoard.fret-diagram-details
                                            .finger-code = #'in-dot
chords3.ly:7:59: warning: Ignoring non-music expression
    \override FretBoard.fret-diagram-details.finger-code =
                                                           #'in-dot
chords3.ly:8:44: error: syntax error, unexpected '.', expecting
SCM_FUNCTION or SCM_IDENTIFIER or SCM_TOKEN
    \override FretBoard.fret-diagram-details
                                            .dot-color = #'white
chords3.ly:8:57: warning: Ignoring non-music expression
    \override FretBoard.fret-diagram-details.dot-color =
                                                         #'white
chords3.ly:3:0: error: errors found, ignoring music expression

Would you know what the problem is?

Many thanks in advance,

Jan.