Function rustc_typeck::check::callee::check_legal_trait_for_method_call

pub fn check_legal_trait_for_method_call(
    tcx: TyCtxt<'_>, 
    span: Span, 
    receiver: Option<Span>, 
    expr_span: Span, 
    trait_id: DefId
)

Checks that it is legal to call methods of the trait corresponding to trait_id (this only cares about the trait, not the specific method that is called).