(defn append!
([^StringBuilder sb s0] (.append sb s0))
([^StringBuilder sb s0 s1]
(.append sb s0)
(.append sb s1))
([^StringBuilder sb s0 s1 s2]
(.append sb s0)
(.append sb s1)
(.append sb s2))
([^StringBuilder sb s0 s1 s2 s3]
(.append sb s0)
(.append sb s1)
(.append sb s2)
(.append sb s3))
([^StringBuilder sb s0 s1 s2 s3 s4]
(.append sb s0)
(.append sb s1)
(.append sb s2)
(.append sb s3)
(.append sb s4)))