Function should_call_clone_as_function 

pub fn should_call_clone_as_function(cx: &LateContext<'_>, ty: Ty<'_>) -> bool

Returns true if ty is a type on which calling Clone through a function instead of as a method, such as Arc::clone() is considered idiomatic.

Lints should avoid suggesting to replace instances of ty::Clone() by .clone() for objects of those types.