Construct a disjunction value from a standard scala.Either
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Construct a left disjunction value.
Spin in tail-position on the left value of the given disjunction.
Spin in tail-position on the left value of the given disjunction.
Spin in tail-position on the right value of the given disjunction.
Spin in tail-position on the right value of the given disjunction.
Construct a right disjunction value.