This method function pre-multiples the "Xy" component of
  conLin by the transpose square-root factor(s) of the
  correlation matrix (matrices) associated with object and adds
  the log-likelihood contribution of object, given by
  logLik(object), to the "logLik" component of
  conLin.
# S3 method for corStruct
recalc(object, conLin, …)an object inheriting from class "corStruct",
   representing a correlation structure.
a condensed linear model object, consisting of a list
   with components "Xy", corresponding to a regression matrix
   (X) combined with a response vector (y), and
   "logLik", corresponding to the log-likelihood of the
   underlying model.
some methods for this generic require additional arguments. None are used in this method.
the recalculated condensed linear model object.