public Filters withRoutingStepExpressions(String... routingStepExpressions) {
        if (this.routingStepExpressions == null) {
            setRoutingStepExpressions(new java.util.ArrayList<String>(routingStepExpressions.length));
        }
        for (String ele : routingStepExpressions) {
            this.routingStepExpressions.add(ele);
        }
        return this;
    }
<p>
A list of expressions as a filter, in which an expression is an object of a step in a routing criteria.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setRoutingStepExpressions(java.util.Collection)} or
{@link #withRoutingStepExpressions(java.util.Collection)} if you want to override the existing values.
</p>

@param routingStepExpressions
       A list of expressions as a filter, in which an expression is an object of a step in a routing criteria.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-connect/src/main/java/com/amazonaws/services/connect/model/Filters.java