Namespace in Imports field not imported from: ‘methods’

[Timothy Bates]

Hi,

I use the methods package in my package to set a class

So, in DESCRIPTION, I have

    Imports:
        methods

And where I call functions from methods, I use the :: syntax, e.g.:

    methods::setClass("MxModel.ACE", contains = "MxModel")

But on check(), I get this error

* checking dependencies in R code ... NOTE

Namespace in Imports field not imported from: ‘methods’

 All declared Imports should be used.

Any clues?

packageVersion("roxygen2")
[1] ‘4.1.1’
packageVersion("devtools")
[1] ‘1.9.0’

[Hadley Wickham]

It's because methods::setClass is called during the build process, so
it's not actually included in the package source code. It's a spurious
warning, so just suppress with a spurious importFrom in the namespace,
e.g. # @importFrom methods new

Hadley

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[Timothy Bates]

gotcha: Thanks again!

It might be helpful to include these "spurious CRAN NOTE" fixes in the devtools wiki/book.

I could not see a direct fix in stackoverflow, though people were clearly having similar problems.