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// +build !go1.13
package errors
// Is detects whether the error is equal to a given error. Errors
// are considered equal by this function if they are the same object,
// or if they both contain the same error inside an errors.Error.
func Is(e error, original error) bool {
if e == original {
return true
}
if e, ok := e.(*Error); ok {
return Is(e.Err, original)
}
if original, ok := original.(*Error); ok {
return Is(e, original.Err)
}
return false
}
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