find_na <- function(df,x,group){
group <- enquo(group)
x <- enquo(x)
var=sym(deparse(x))
list <- df%>%
group_by(!!group)%>%
filter(is.na(!!x))%>%
select(!!group)%>%
unlist()%>%
unname()
df%>%
filter(!!group %in% list)
}
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