Processes all RSP preprocessing directives.
# S3 method for RspDocument
preprocess(object, recursive=TRUE, flatten=TRUE, envir=parent.frame(),
  clipboard=new.env(), ..., verbose=FALSE)If TRUE, any RspDocuments introduced via
     preprocessing directives are recursively parsed and preprocessed
     as well.
If TRUE, any RspDocument introduced is
     replaced (inserted and expanded) by its list of
     RspConstructs.
The environment where the preprocessing is evaluated.
An environment hold cut'n'paste directives during
     preprocessing.
Not used.
See Verbose.
Returns an RspDocument.
For more information see RspDocument.