@Override
    @Nullable
    public <R, C> R accept(Visitor<R, C> v, C context) {
        return opMixin.accept(v, context);
    }
{@code CollectionOperation} is a collection typed operation

@author tiwe
@param <E> element type
querydsl-core/src/main/java/com/querydsl/core/types/dsl/CollectionOperation.java