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| auto  | farm_ng::makeA (bool a_error) -> Expected< A > | 
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| auto  | farm_ng::makeAb (bool a_error, bool b_error) -> Expected< Ab > | 
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| auto  | farm_ng::makeAbc (bool a_error, bool b_error, bool c_error) -> Expected< Abc > | 
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| auto  | farm_ng::makeAbcAtOnce (bool a_error, bool b_error, bool c_error) -> Expected< Abc > | 
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| auto  | farm_ng::sum (Expected< A > maybe_left, Expected< A > maybe_right) -> Expected< A > | 
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|   | TEST (expected, success) | 
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|   | TEST (expected, single_error) | 
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|   | TEST (expected, multi_error) | 
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|   | TEST (expected, unwrap) | 
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|   | TEST (expected, optional) | 
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|   | TEST (expected, fancy_error) | 
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