The import org.apache.commons.lang cannot be resolved in GWT 2.7

Hi,

I have upgraded gwt version from gwt 2.5 to gwt 2.7.

It shows error after upgrading 

The import org.apache.commons.lang.StringUtils cannot be resolved. 

org.apache.commons.lang.StringEscapeUtils cannot be resolved. 

At a line no. if (!StringUtils.isEmpty(pCommande)) 

StringEscapeUtils.unescapeHtml(file);

Is gwt remove support for it? is there alternate api for same? why is it removed?

Thanks,

Bhumika

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