user=> (coll? {})
true
user=> (coll? #{})
true
user=> (coll? [])
true
user=> (coll? ())
true
user=> (coll? 4)
false
user=> (coll? "fred")
false
user=> (coll? true)
false
user=> (coll? nil)
false
user=> (coll? {})
true
user=> (coll? #{})
true
user=> (coll? [])
true
user=> (coll? ())
true
user=> (coll? 4)
false
user=> (coll? "fred")
false
user=> (coll? true)
false
user=> (coll? nil)
false
user=> (coll? {})
true
user=> (coll? #{})
true
user=> (coll? [])
true
user=> (coll? ())
true
user=> (coll? 4)
false
user=> (coll? "fred")
false
user=> (coll? true)
false
user=> (coll? #{})
true
user=> (coll? [])
true
user=> (coll? ())
true
user=> (coll? 4)
false
user=> (coll? "fred")
false
user=> (coll? true)
false
(coll? #{}) ;true
(coll? []) ;true
(coll? ()) ;true
(coll? 4) ;false
(coll? "fred") ;false
(coll? true) ;false