public BooleanExpression in(SubQueryExpression<Tuple> coll) {
        return Expressions.booleanOperation(Ops.IN, getProjection(), coll);
    }
{@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