@Override
    public BooleanExpression eq(Expression<? extends T> expr) {
        return Expressions.predicate(Ops.EQ, this, expr);
    }
{@code FetchableSubQueryBase} extends {@link com.querydsl.core.support.FetchableQueryBase} to provide fluent Expression creation functionality

@param <T>
@param <Q>
querydsl-core/src/main/java/com/querydsl/core/support/FetchableSubQueryBase.java