setupPackageOptions: Package Specific Options
In pkgmaker: Package development utilities

The following functions to access/set the options from the set are assigned in envir:

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  setupPackageOptions(..., NAME = NULL,
    ENVIR = topenv(parent.frame()),
    RESET = isLoadingNamespace())

`...`	a single named list or named arguments that provide the default options and their values.
`NAME`	name of the set of options. This is used as a prefix for the name of the associated global option: `package:<name>`.
`ENVIR`	environment where the option wrapper functions will be defined. No function is defined if `ENVIR=NULL`
`RESET`	a logical that indicates whether the option set should overwrite one that already exists if necessary. The default is `FALSE` (i.e. no reset), except when loading a namespace, either from an installed package or a development package – with devtools. If `FALSE`, an error is thrown if trying to setup options with the same name.