object includes a varStruct component, the inverse of
the standard deviations of the variance function structure represented
by the corresponding varFunc object are returned; else, a
vector of ones of length equal to the number of observations in the
data frame used to fit the associated linear mixed-effects model is
returned.## S3 method for class 'lmeStruct':
varWeights(object)lmeStruct,
representing a list of linear mixed-effects model components, such as
reStruct, corStruct, and varFunc objects.object includes a varStruct component, a vector with
the corresponding variance weights; else, or a vector of ones.varWeights