Nothing
#Global variables need it.
#' @importFrom utils globalVariables
if (getRversion() >= '2.15.1')
globalVariables(c('top','kvalue','buttonsFrame','lhsVariable', 'rhsVariable', 'subsetVariable', 'onHelp', 'xBox', 'outerOperatorsFrame',
'formulaFrame','subsetFrame','lhsEntry','setBusyCursor','setIdleCursor'))
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