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The origin of plugins in XperienCentral comes from lies in the identical functionality available in GX WebManager 9 which were was known as a Web Component BundlesBundle, referred to using the shortened abbreviation WCB. Because of this legacy, you will come across the string "WCB" in functions, methods, properties and parameters in the source code and Java classes exposed by XperienCentral for developing plugins. The phased-out term "WCB" is identical to the term "plugin" used in all XperienCentral documentation.
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