Function: `StructMap`

Used to map a struct to a new struct of the same type containing the result

Method Signature

StructMap(struct=[structloose], callback=[function:BiFunction], parallel=[boolean], maxThreads=[integer])

Argument	Type	Required	Description	Default
`struct`	`struct`	`true`	The target struct to test
`callback`	`function:BiFunction`	`true`	The function used to produce the right-hand value assignment in the new struct. The function will be passed 3 arguments: the key, the value, the struct. You can alternatively pass a Java BiFunction which will only receive the first 2 args.
`parallel`	`boolean`	`false`	Specifies whether the items can be executed in parallel	`false`
`maxThreads`	`integer`	`false`	The maximum number of threads to use when parallel = true