Namespaces in Imports field not imported from:
  ‘ggplot2’ ‘httr’ ‘jsonlite’
  All declared Imports should be used.
Namespaces in Imports field not imported from:
  ‘ggplot2’ ‘httr’ ‘jsonlite’
  All declared Imports should be used.
Namespaces in Imports field not imported from:
  'ggplot2' 'httr' 'jsonlite'
  All declared Imports should be used.
Namespaces in Imports field not imported from:
  ‘ggplot2’ ‘httr’ ‘jsonlite’
  All declared Imports should be used.
Namespaces in Imports field not imported from:
  ‘ggplot2’ ‘httr’ ‘jsonlite’
  All declared Imports should be used.
Namespaces in Imports field not imported from:
  ‘ggplot2’ ‘httr’ ‘jsonlite’
  All declared Imports should be used.