## S3 method for class 'Options}(this, pathname, value, overwrite=TRUE, ...)':
setOptionundefined
 - pathname{A single
character string specifying the path to the
      option.}
   - value{The value to be assigned to the option.}
- overwrite{If
TRUE, already existing options are overwritten,
      otherwise not.}
   - ...{Not used.}
Returns (invisibly) the old option value. 
 [object Object]
 *hasOption().
   *setOption().
   For more information see Options.internal 
methods 
programming