PerSession(object, ..., negation)# S4 method for ANY
PerSession(object, ..., negation)
# S4 method for gaSegmentSequenceStep
PerSession(object, ..., negation)
# S4 method for gaSegmentSequenceFilter
PerSession(object, ..., negation)
# S4 method for gaMetExpr
PerSession(object, ..., negation)
# S4 method for formula
PerSession(object, ..., negation)