Create a 2D depiction of a molecule. If there are more than
one molecules supplied, return a grid woth ncol columns,.
view.molecule.2d(
  molecule,
  ncol = 4,
  width = 200,
  height = 200,
  depictor = NULL
)The molecule to query. Should be a `jobjRef` representing an `IAtomContainer`
Default 4
Default 200
Default 200
Default NULL