@Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("{");
        if (getTextInput() != null)
            sb.append("TextInput: ").append(getTextInput()).append(",");
        if (getQQuery() != null)
            sb.append("QQuery: ").append(getQQuery()).append(",");
        if (getQPlugin() != null)
            sb.append("QPlugin: ").append(getQPlugin()).append(",");
        if (getFileUpload() != null)
            sb.append("FileUpload: ").append(getFileUpload());
        sb.append("}");
        return sb.toString();
    }
Returns a string representation of this object. This is useful for testing and debugging. Sensitive data will be
redacted from this string using a placeholder value.

@return A string representation of this object.

@see java.lang.Object#toString()
aws-java-sdk-qapps/src/main/java/com/amazonaws/services/qapps/model/Card.java