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To implement your scenarios, you will also need to create the following function:

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unescapeHTML

The unescapeHTML function converts HTML codes into Unicode characters. This function is needed for correctly displaying error messages. Input parameters:
NameJava typeDescription
htmlStringStringString of HTML codes
Output parameter type: String (string of Unicode characters). The Exceptions thrown field should be left blank. Java source: 
//Unescapes a string containing entity escapes to a string containing the actual Unicode characters
//corresponding to the escapes. Supports HTML 4.0 entities. 
return StringEscapeUtils.unescapeHtml4(htmlString);