Update alg_traits.jl

Author: ChrisRackauckas

src/alg_traits.jl

@@ -247,9 +247,19 @@ end
 """
     allows_non_wiener_noise(alg::AbstractSDEAlgorithm)
 
-Trait declaration for whether an algorithm allows for non-additive wiener noise.
+Trait declaration for whether an algorithm allows for non-wiener noise.
 In general, this is false for any high order (that uses levy areas) or adaptive method.
 
 Defaults to false.
 """
 allows_non_wiener_noise(alg::AbstractSDEAlgorithm) = false
+
+"""
+    requires_additive_noise(alg::AbstractSDEAlgorithm)
+
+Trait declaration for whether an algorithm requires additive noise, i.e. the noise
+function is not a function of `u`.
+
+Defaults to false
+"""
+requires_additive_noise(alg::AbstractSDEAlgorithm) = false