ConversionResult (@NotNull PsiType ltype, @NotNull PsiType rtype, @NotNull Position position, @NotNull GroovyPsiElement context) { PsiType lBound = TypesKt.promoteLowerBoundWildcard(ltype, context); PsiType rBound = TypesKt.promoteLowerBoundWildcard(rtype, context); if (lBound == null || rBound == null) return null; if (TypeConversionUtil.isAssignable(lBound, rBound)) return ConversionResult.OK; return null; }