question: @ Override public void update ( List < EnvVar > dataList ) { envVarList . clear ( ) ; if ( dataList == null ) { for ( EnvVar envVar : builtInEnvVarMap . values ( ) ) { envVarList . add ( envVar ) ; } } else { for ( EnvVar envVar : dataList ) { if ( builtInEnvVarMap . containsKey ( envVar . getName ( ) ) ) { envVarList . add ( new EnvVar ( envVar , true ) ) ; } else { envVarList . add ( new EnvVar ( envVar , false ) ) ; } } } setEnvironmentVariableValues ( ) ; }
target:  Update the environment variables.