There are ::: calls to the package's namespace in its code. A package
  almost never needs to use ::: for its own objects:
  'estoutstorage'
descsto: no visible global function definition for 'is'
Undefined global functions or variables:
  is
Consider adding
  importFrom("methods", "is")
to your NAMESPACE file (and ensure that your DESCRIPTION Imports field
contains 'methods').
There are ::: calls to the package's namespace in its code. A package
  almost never needs to use ::: for its own objects:
  ‘estoutstorage’
descsto: no visible global function definition for ‘is’
Undefined global functions or variables:
  is
Consider adding
  importFrom("methods", "is")
to your NAMESPACE file (and ensure that your DESCRIPTION Imports field
contains 'methods').
There are ::: calls to the package's namespace in its code. A package
  almost never needs to use ::: for its own objects:
  ‘estoutstorage’
descsto: no visible global function definition for ‘is’
Undefined global functions or variables:
  is
Consider adding
  importFrom("methods", "is")
to your NAMESPACE file (and ensure that your DESCRIPTION Imports field
contains 'methods').
There are ::: calls to the package's namespace in its code. A package
  almost never needs to use ::: for its own objects:
  ‘estoutstorage’
descsto: no visible global function definition for ‘is’
Undefined global functions or variables:
  is
Consider adding
  importFrom("methods", "is")
to your NAMESPACE file (and ensure that your DESCRIPTION Imports field
contains 'methods').
There are ::: calls to the package's namespace in its code. A package
  almost never needs to use ::: for its own objects:
  'estoutstorage'
descsto: no visible global function definition for 'is'
Undefined global functions or variables:
  is
Consider adding
  importFrom("methods", "is")
to your NAMESPACE file (and ensure that your DESCRIPTION Imports field
contains 'methods').
There are ::: calls to the package's namespace in its code. A package
  almost never needs to use ::: for its own objects:
  ‘estoutstorage’
descsto: no visible global function definition for ‘is’
Undefined global functions or variables:
  is
Consider adding
  importFrom("methods", "is")
to your NAMESPACE file (and ensure that your DESCRIPTION Imports field
contains 'methods').
There are ::: calls to the package's namespace in its code. A package
  almost never needs to use ::: for its own objects:
  ‘estoutstorage’
descsto: no visible global function definition for ‘is’
Undefined global functions or variables:
  is
Consider adding
  importFrom("methods", "is")
to your NAMESPACE file (and ensure that your DESCRIPTION Imports field
contains 'methods').
There are ::: calls to the package's namespace in its code. A package
  almost never needs to use ::: for its own objects:
  ‘estoutstorage’
descsto: no visible global function definition for ‘is’
Undefined global functions or variables:
  is
Consider adding
  importFrom("methods", "is")
to your NAMESPACE file (and ensure that your DESCRIPTION Imports field
contains 'methods').
There are ::: calls to the package's namespace in its code. A package
  almost never needs to use ::: for its own objects:
  ‘estoutstorage’
descsto: no visible global function definition for ‘is’
Undefined global functions or variables:
  is
Consider adding
  importFrom("methods", "is")
to your NAMESPACE file (and ensure that your DESCRIPTION Imports field
contains 'methods').
There are ::: calls to the package's namespace in its code. A package
  almost never needs to use ::: for its own objects:
  'estoutstorage'
descsto: no visible global function definition for 'is'
Undefined global functions or variables:
  is
Consider adding
  importFrom("methods", "is")
to your NAMESPACE file (and ensure that your DESCRIPTION Imports field
contains 'methods').
There are ::: calls to the package's namespace in its code. A package
  almost never needs to use ::: for its own objects:
  ‘estoutstorage’
descsto: no visible global function definition for ‘is’
Undefined global functions or variables:
  is
Consider adding
  importFrom("methods", "is")
to your NAMESPACE file (and ensure that your DESCRIPTION Imports field
contains 'methods').
There are ::: calls to the package's namespace in its code. A package
  almost never needs to use ::: for its own objects:
  ‘estoutstorage’
descsto: no visible global function definition for ‘is’
Undefined global functions or variables:
  is
Consider adding
  importFrom("methods", "is")
to your NAMESPACE file (and ensure that your DESCRIPTION Imports field
contains 'methods').
There are ::: calls to the package's namespace in its code. A package
  almost never needs to use ::: for its own objects:
  'estoutstorage'
descsto: no visible global function definition for 'is'
Undefined global functions or variables:
  is
Consider adding
  importFrom("methods", "is")
to your NAMESPACE file (and ensure that your DESCRIPTION Imports field
contains 'methods').