new_contents: """
  Wrapped Facet Example
  ---------------------
  This shows an example of a wrapped facet plot, where faceted data are limited
  to a specified number of columns.
  """
  # category: other charts
  
  import altair as alt
  from vega_datasets import data
  
  source = data.barley.url
  
  alt.Chart(source).mark_point().encode(
      alt.X('median(yield):Q', scale=alt.Scale(zero=False)),
      y='variety:O',
      color='year:N',
      facet='site:O',
  ).properties(
      columns=2,
      width=200,
      height=100,
  )
  
subject: add wrapped facet example