(sequential? coll)
Returns true if coll implements Sequential
user=> (sequential? '(1 2 3))
true
user=> (sequential? [1 2 3])
true
user=> (sequential? (range 1 5))
true
user=> (sequential? '())
true
user=> (sequential? [])
true
user=> (sequential? nil)
false
user=> (sequential? 1)
false
user=> (sequential? "abc")
false
user=> (sequential? {:a 2 :b 1})
false
user=> (sequential? #{1 2 3})
false