'right' && overflowsRight) ||\n      (placement === 'top' && overflowsTop) ||\n      (placement === 'bottom' && overflowsBottom);\n\n    // flip the variation if required\n    const isVertical = ['top', 'bottom'].indexOf(placement) !== -1;\n\n    // flips variation if reference element overflows boundaries\n    const flippedVariationByRef =\n      !!options.flipVariations &&\n      ((isVertical && variation === 'start' && overflowsLeft) ||\n        (isVertical && variation === 'end' && overflowsRight)...