@Override
    public Expression<Tuple> getProjection() {
        if (mixin == null) {
            mixin = ExpressionUtils.list(Tuple.class, localColumns);
        }
        return mixin;
    }
{@code ForeignKey} defines a foreign key on a table to another table

@author tiwe

@param <E>
querydsl-sql/src/main/java/com/querydsl/sql/ForeignKey.java