Trovit/src/main/java/org/openestate/io/trovit/TrovitUtils.java
public static String printBooleanValue(Boolean value) {
        if (value == null)
            throw new IllegalArgumentException("Can't print empty boolean value!");

        return DatatypeConverter.printBoolean(value);
    }
public static String printBooleanValue(Boolean value) {
        if (value == null)
            throw new IllegalArgumentException("Can't print empty boolean value!");

        return DatatypeConverter.printBoolean(value);
    }
Write a {@link Boolean} value into XML output.

@param value value to write
@return XML string
@throws IllegalArgumentException if a validation error occurred