Making StringBuilder usable from Xtend

ppareit.util.StringBuilderUtil.xtend

package ppareit.util

// Add following import to any file thats wants to use StringBuilder
import static extension ppareit.util.StringBuilderUtil.*

class StringBuilderUtil {

    /*
     * Make += work correctly on StringBuilder objects.
     */
    static def <T> +=(StringBuilder builder, T t) {
        builder.append(t)
    }
    
    /*
     * Example usage:
     */
    static def main(String [] args) {
        val msg = new StringBuilder()
        msg += "Some text "
        msg += "gets added"
        System.out.println(msg.toString())
    }

}