declare namespace org {
    namespace springframework {
        namespace jdbc {
            namespace datasource {
                /**
                 * Subinterface of {@link java.sql.Connection} to be implemented by
                 * Connection proxies. Allows access to the underlying target Connection.
                 * <p>This interface can be checked when there is a need to cast to a
                 * native JDBC Connection such as Oracle's OracleConnection. Alternatively,
                 * all such connections also support JDBC 4.0's {@link Connection#unwrap}.
                 * @author Juergen Hoeller
                 * @since 1.1
                 * @see TransactionAwareDataSourceProxy
                 * @see LazyConnectionDataSourceProxy
                 * @see DataSourceUtils#getTargetConnection(java.sql.Connection)
                 */
                // @ts-ignore
                interface ConnectionProxy extends java.sql.Connection {
                    /**
                     * Return the target Connection of this proxy.
                     * <p>This will typically be the native driver Connection
                     * or a wrapper from a connection pool.
                     * @return the underlying Connection (never {#code null})
                     */
                    // @ts-ignore
                    getTargetConnection(): java.sql.Connection
                }
            }
        }
    }
}