Bug Fix: Prevent 'a is undefined' error when removing layers #75
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remove index and layer from _layer array
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When a layer is removed via the removeLayer method, the layer is set to undefined in the _layers array using the delete operator, which causes the array to become sparse. This leads to issues when iterating over the array in the _update() method, causing the error.
Check the green marked areas to see the error message, and the way the method is used