object, as
the mean connectivity matrix across runs.This method returns NULL on an empty object. The
  result is a matrix with several attributes attached, that
  are used by plotting functions such as
  consensusmap to annotate the plots.
S4 (NMFfitXn)
`consensus`(object, ..., no.attrib = FALSE)
    
    predict method.predict, except for the
  vector and factor methods.TRUE) or not
  (FALSE).