code: def leaveWhitespace( self ):
          
          self.skipWhitespace = False
          self.exprs = [ e.copy() for e in self.exprs ]
          for e in self.exprs:
              e.leaveWhitespace()
          return self
docs: Extends ``leaveWhitespace`` defined in base class, and also invokes ``leaveWhitespace`` on
             all contained expressions.