public BooleanExpression in(CollectionExpression<?,Tuple> coll) {
        return Expressions.booleanOperation(Ops.IN, getProjection(), coll);
    }
{@code PrimaryKey} defines a primary key on table

@param <E> expression type

@author tiwe
querydsl-sql/src/main/java/com/querydsl/sql/PrimaryKey.java