\override Slur #'after-line-breaking-callback = #New_slur::after_line_breaking
\override Slur #'print-function = #New_slur::print
\override Slur #'height = ##f
\override Slur #'after-line-breaking-callback = #New_slur::after_line_breaking
\override Slur #'print-function = #New_slur::print
\override Slur #'height = ##f