Is there a plan to add a GroupBy formula?

Something like:

List(
  Object("foo", 1, "bar", 1),
  Object("foo", 1, "bar", 2),
  Object("foo", 2, "bar", 3),
  Object("foo", 2, "bar", 4)
).GroupBy("foo")

returns

List(
List(Object(“foo”, 1, “bar”, 1), Object(“foo”, 1, “bar”, 2)),
List(Object(“foo”, 2, “bar”, 3), Object(“foo”, 2, “bar”, 4))
)

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