public void setRoles(java.util.Collection<String> roles) {
        if (roles == null) {
            this.roles = null;
            return;
        }

        this.roles = new java.util.ArrayList<String>(roles);
    }
<p>
A list of roles to be attached. There must be at least one role.
</p>

@param roles
       A list of roles to be attached. There must be at least one role.
aws-java-sdk-budgets/src/main/java/com/amazonaws/services/budgets/model/IamActionDefinition.java