Escape character causes issues e.g. string 'type

[shafreenAnfar]

consider the below program

import ballerina/graphql;

type DynamicFilterCriteria record {
    string accountClassification;
    string recordType;
    string region;
};

type OpportunityData record {
    // string? Entry_Vector__c;
    Account account;
    string id;
};

type LeadData record {
    string Id;
    // string? Question_Comment__c;
};

type Account record {
    Attributes attributes;
    string Name;
};

type YtdFilterCriteria record {
    Region region;
    string dateFrom;
    string dateTo;
};

type Attributes record {
        string 'type;
        string url;
    };

type BantFilterCriteria record {
    *YtdFilterCriteria;
    BantType bantType;
    WonType wonType;
};

type ChannelFilterCriteria record {
    string PSSupportStartDate;
    string PSSupportEndDate;
    Region region;
};

type SQLFilterCriteria record {
    boolean iam;
    Region region;
};

public enum BantType {
    Direct,
    Channel
}

public enum WonType {
    Closed,
    Open
}

public enum Region {
    NA = "NA",
    APAC = "APAC", 
    MEA = "MEA",
    ANZ = "ANZ",
    EU1 = "EU 1",
    EU2 = "EU 2",
    EU3 = "EU 3"
}

service /graphql on new graphql:Listener(9000) {
    resource function get opportunity/bant(BantFilterCriteria bantFilterCriteria) returns OpportunityData[]|error {
        return error("");
    }

    resource function get opportunity/ytd(YtdFilterCriteria ytdFilterCriteria) returns OpportunityData[]|error {
        return error("");
    }

    resource function get opportunity/channel(ChannelFilterCriteria channelFilterCriteria) returns OpportunityData[]|error {
        return error("");
    }
}

This produces something as follows,

I am not sure if that is the right thing to do.