public DslExpression<E> as(EntityPath<E> alias) {
        return Expressions.dslOperation(getElementType(), Ops.ALIAS, mixin, alias);
    }
{@code CollectionExpressionBase} is an abstract base class for {@link CollectionExpression} implementations

@author tiwe

@param <T> expression type
@param <E> collection element type
querydsl-core/src/main/java/com/querydsl/core/types/dsl/CollectionExpressionBase.java