public TeamsChannelConfiguration withGuardrailPolicyArns(String... guardrailPolicyArns) {
        if (this.guardrailPolicyArns == null) {
            setGuardrailPolicyArns(new java.util.ArrayList<String>(guardrailPolicyArns.length));
        }
        for (String ele : guardrailPolicyArns) {
            this.guardrailPolicyArns.add(ele);
        }
        return this;
    }
The list of IAM policy ARNs that are applied as channel guardrails. The AWS managed 'AdministratorAccess' policy
is applied by default if this is not set.
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setGuardrailPolicyArns(java.util.Collection)} or {@link #withGuardrailPolicyArns(java.util.Collection)}
if you want to override the existing values.
</p>

@param guardrailPolicyArns
       The list of IAM policy ARNs that are applied as channel guardrails. The AWS managed 'AdministratorAccess'
       policy is applied by default if this is not set.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-chatbot/src/main/java/com/amazonaws/services/chatbot/model/TeamsChannelConfiguration.java