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| with {:width, {:ok, width}} <- {:width, Map.fetch(opts, :width)}, | |
| {:height, {:ok, height}} <- {:height, Map.fetch(opts, :height)} | |
| do | |
| {:ok, width * height} | |
| else | |
| {:width, :error} -> {:error, :missing_width} | |
| {:height, :error} -> {:error, :missing_height} | |
| end |
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