The contents of the narrative are entirely generated from the core elements
in the content and some of the content is generated from extensions. The
narrative SHALL reflect the impact of all modifier extensions.
The contents of the narrative may contain additional information not found in
the structured data. Note that there is no computable way to determine what
the extra information is, other than by human inspection.
Returns the enum constant of this type with the specified name.
The string must match exactly an identifier used to declare an
enum constant in this type. (Extraneous whitespace characters are
name - the name of the enum constant to be returned.