diff --git a/javascript/ql/lib/semmle/javascript/frameworks/LodashUnderscore.qll b/javascript/ql/lib/semmle/javascript/frameworks/LodashUnderscore.qll
index 7c2e6aa37a58..202586227375 100644
--- a/javascript/ql/lib/semmle/javascript/frameworks/LodashUnderscore.qll
+++ b/javascript/ql/lib/semmle/javascript/frameworks/LodashUnderscore.qll
@@ -341,6 +341,18 @@ module LodashUnderscore {
preservesValue = true
}
}
+
+ private class LodashGroupBy extends DataFlow::SummarizedCallable {
+ LodashGroupBy() { this = "_.groupBy" }
+
+ override DataFlow::CallNode getACall() { result = member("groupBy").getACall() }
+
+ override predicate propagatesFlow(string input, string output, boolean preservesValue) {
+ input = "Argument[0]" and
+ output = ["Argument[1].Parameter[0]", "ReturnValue"] and
+ preservesValue = false
+ }
+ }
}
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