Either reusable or single_use. Whether this source should be reusable or not. Some source types may or may not be reusable by construction, while others may leave the option at creation. If an incompatible value is passed, an error will be returned.
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 not permitted.)