simplify SugarVectorExpression
simplify noNA
simplify noNA
adapt filter to simpler SugarVectorExpression
adapt head to new SugarVectorExpression
rework ifelse on top of mapply
not testing this branch yet
not using RTYPE in filter
simplify import
adapt mapply
rework pmin and pmax on top of mapply
added is_mapply_compatible trait class
added same_mapply_scalar_type
using mapply_scalar_type
reimpl pow using mapply
rework rep and rep_each
rework rep_len
rework replicate
simplify sapply
rework rev