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package errx
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// go2 errors
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type Wrapper interface {
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Unwrap() error
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}
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// pkg/errors
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type Causer interface {
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Cause() error
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}
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func Unwrap(err error) error {
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switch e := err.(type) {
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case Wrapper:
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return e.Unwrap()
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case Causer:
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return e.Cause()
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}
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return err
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}
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var Cause = Unwrap
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