nullSafeLowerCase(java.lang.String) not found in class 'sailpoint.tools.Util'

I am using Util.nullSafeLowerCase(String) in my BeforeProvisioning Rule, but it gives this error. Is the function deprecated?

Typed variable declaration : Error in method invocation: Static method nullSafeLowerCase( java.lang.String ) not found in class sailpoint.tools.Util : at Line: 77 : in file: inline evaluation of: import java.text.Normalizer; import org.apache.commons.lang.StringUtils; . . . '' : Util .nullSafeLowerCase ( idAttrs .getString ( "legalFirstName" ) ) BSF info: Generate_sAMAccountName at line: 0 column: columnNo

Hi Prashanth,

This error indicates the function you are trying to invoke isn’t available. Can you point us to where you found the documentation that indicated you can use this function?

/javadoc/sailpoint/tools/Util.html#nullSafeLowerCase-java.lang.String-