src/constraint/dayofweekcount.js
function(d) {
    return d.dcExtent || (d.dcExtent = [1, Math.ceil(later.D.extent(d)[1] /7)]);
  }
function(d) {
    return d.dcExtent || (d.dcExtent = [1, Math.ceil(later.D.extent(d)[1] /7)]);
  }
function ( d ) { return d . dcExtent || ( d . dcExtent = [ 1 , Math . ceil ( later . D . extent ( d ) [ 1 ] / 7 ) ] ) ; }
The minimum and maximum valid day values of the month specified.
Zero to specify the last day of week count of the month.

@param {Date} d: The date indicating the month to find the extent of
The minimum and maximum valid day values of the month specified . Zero to specify the last day of week count of the month .