Essential
- 
	Before we begin
Essential information before you begin the tutorial. 
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	result<>
Gentle introduction to writing code with simple success-or-failure return types. 
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	outcome<>
Success-or-failure return types where failure can take two forms, expected/handled failure and unexpected/abort failure. 
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	No-value policies
Describes the concept of NoValuePolicy and how to use no-value policies. 
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	Conventions
Why you should avoid custom Etypes in public APIs.



