Re-jigged the class implementation to get better support from roxygen2 and CRAN check(). Majority of public functions are documented (remaining are the CRUD functions)

man/DBConnection-cash-isConnected.Rd

@@ -0,0 +1,11 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/DBConnection-Connect.R
+\name{DBConnection$isConnected}
+\alias{DBConnection$isConnected}
+\title{DBConnection$isConnected}
+\value{
+\if{html}{\out{<logical>}} TRUE if connected to the database, FALSE otherwise
+}
+\description{
+Indicates if the instance has an active database connection.
+}