Packages in Depends field not imported from:
  'Formula' 'sm'
  These packages need to be imported from (in the NAMESPACE file)
  for when this namespace is loaded but not attached.
checkRd: (7) file 'plmm.data.Rd': \item in \describe must have non-empty label
Packages in Depends field not imported from:
  ‘Formula’ ‘sm’
  These packages need to be imported from (in the NAMESPACE file)
  for when this namespace is loaded but not attached.
checkRd: (7) file 'plmm.data.Rd': \item in \describe must have non-empty label
Packages in Depends field not imported from:
  ‘Formula’ ‘sm’
  These packages need to be imported from (in the NAMESPACE file)
  for when this namespace is loaded but not attached.
Packages in Depends field not imported from:
  ‘Formula’ ‘sm’
  These packages need to be imported from (in the NAMESPACE file)
  for when this namespace is loaded but not attached.
checkRd: (7) file 'plmm.data.Rd': \item in \describe must have non-empty label
Packages in Depends field not imported from:
  'Formula' 'sm'
  These packages need to be imported from (in the NAMESPACE file)
  for when this namespace is loaded but not attached.
Packages in Depends field not imported from:
  ‘Formula’ ‘sm’
  These packages need to be imported from (in the NAMESPACE file)
  for when this namespace is loaded but not attached.
Packages in Depends field not imported from:
  ‘Formula’ ‘sm’
  These packages need to be imported from (in the NAMESPACE file)
  for when this namespace is loaded but not attached.
Packages in Depends field not imported from:
  ‘Formula’ ‘sm’
  These packages need to be imported from (in the NAMESPACE file)
  for when this namespace is loaded but not attached.
Packages in Depends field not imported from:
  ‘Formula’ ‘sm’
  These packages need to be imported from (in the NAMESPACE file)
  for when this namespace is loaded but not attached.
Packages in Depends field not imported from:
  'Formula' 'sm'
  These packages need to be imported from (in the NAMESPACE file)
  for when this namespace is loaded but not attached.
Packages in Depends field not imported from:
  ‘Formula’ ‘sm’
  These packages need to be imported from (in the NAMESPACE file)
  for when this namespace is loaded but not attached.
Packages in Depends field not imported from:
  'Formula' 'sm'
  These packages need to be imported from (in the NAMESPACE file)
  for when this namespace is loaded but not attached.