private String indent(final int level) {
        return IntStream.range(0, level)
            .collect(StringBuilder::new, (sb, i) -> sb.append("    "), StringBuilder::append)
            .toString();
    }
Prints a welcome message to the output channel.

@param injector the injector to use
runtime-parent/runtime-application/src/main/java/com/speedment/runtime/application/AbstractApplicationBuilder.java