https://drill.apache.org/apidocs/org/apache/drill/exec/expr/fn/impl/gaggr/CorrelationFunctions.UInt2Correlation.html
CorrelationFunctions.UInt2Correlation (Drill : 1.22.0 API)
declaration: package: org.apache.drill.exec.expr.fn.impl.gaggr, class: CorrelationFunctions, class: UInt2Correlation
drillapi