Low level interface function to the COIN-OR Clp function
  Clp_lengthNames. Consult the COIN-OR Clp documentation
  for more detailed information.
lengthNamesCLP(lp)An object of class "'>clpPtr" as returned by
    initProbCLP. This is basically a pointer to a COIN-OR Clp
    problem object.
Number of characters of the longest name in the Model.
Interface to the C function lengthNames which calls
  the COIN-OR Clp function Clp_lengthNames.
The COIN-OR Clp home page at https://projects.coin-or.org/Clp