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Usage guidance, also known as a tag wiki excerpt, is a short blurb that describes when and why a tag should be used on this site specifically.
Methods:
deserialize(jsonString, apexType): Deserializes the specified JSON string into an Apex object of the specified type.
deserializeStrict(jsonString, apexType): Deserializes the specified JSON string into an Apex object of the specified type.
deserializeUntyped(jsonString): Deserializes the specified JSON string into collections of primitive data types.