If you know an easy way to check, please let me know
FacesContext
classFacesContext
class
$ grep -iIr import | grep FacesContext
FacesContext.class.getPackage().getImplementationVersion();
FacesContext.class.getPackage().getImplementationTitle();
Try opening /META-INF/MANIFEST.MF
For Maven projects
<dependency>
<groupId>org.glassfish</groupId>
<artifactId>javax.faces</artifactId>
<version>2.3.9</version>
<scope>provided</scope>
</dependency>
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