public static void assertNotBlank(final String name, final String value, final String msg) {
        assertTrue(!StringUtils.isBlank(value), name + " cannot be blank" + (msg != null ? ": " + msg : Pac4jConstants.EMPTY_STRING));
    }
Verify that a String is not blank otherwise throw a {@link TechnicalException}.

@param name  name if the string
@param value value of the string
@param msg   an expanatory message
pac4j-core/src/main/java/org/pac4j/core/util/CommonHelper.java