Ballerina for healthcare

public function main() returns error? {
    // The following example is a simple serialized Patient resource to parse
    json input = {
        "resourceType": "Patient",
        "name": [
            {
                "family": "Simpson"
            }
        ]
    };

    // Parse it - you can pass the input (as a string or a json) and the
    // type of the resource you want to parse.
    international401:Patient patient = check fhirParser:parse(input).ensureType();

    // Access the parsed data
    fhir:HumanName[]? names = patient.name;
    if names is () || names.length() == 0 {
        return error("Failed to parse the names");
    }
    io:println("Family Name: ", names[0]);
}

final string msg =
"MSH|^~\\&|ADT1|GOOD HEALTH HOSPITAL|GHH LAB, INC.|GOOD HEALTH" +
"HOSPITAL|198808181126|SECURITY|ADT^A01^ADT_A01|MSG00001|P|2.3||\rEVN|A01|" +
"200708181123||\rPID|1||PATID1234^5^M11^ADT1^MR^GOOD HEALTH HOSPITAL~123456789^^^USSSA^SS||" +
"BATMAN^ADAM^A^III||19610615|M||C|2222 HOME STREET^^GREENSBORO^NC^27401-1020|GL|" +
"(555)555-2004|(555)555-2004||S||PATID12345001^2^M10^ADT1^AN^A|444333333|987654^NC|" +
"\rNK1|1|NUCLEAR^NELDA^W|SPO^SPOUSE||||NK^NEXT OF KIN$\rPV1|1|I|2000^2012^01||||" +
"004777^ATTEND^AARON^A|||SUR||||ADM|A0|";

public function main() returns error? {
    // Transform HL7v2 message to FHIR R4.
    // You can pass a HL7v2 message and get a FHIR R4 Bundle based on
    // the mappings defined at
    // https://build.fhir.org/ig/HL7/v2-to-fhir/branches/master/datatype_maps.html.
    json v2tofhirResult = check v2tofhirr4:v2ToFhir(msg);
    io:println("Transformed FHIR message: ", v2tofhirResult.toString());

    // v2tofhirr4 library exposes these low level functions as well,
    // In this case, by using stringToHl7 function you can pass a HL7v2 message string and get a parsed HL7v2 message model.
    hl7:Message hl7msg = check v2tofhirr4:stringToHl7(msg);
    if (hl7msg is hl7v23:ADT_A01) {
        // if you want to work with HL7v2 segments directly.
        // Transform HL7v2 PID to FHIR R4 Patient Name.
        r4:HumanName[]? patientName = v2tofhirr4:pidToPatientName(hl7msg.pid.pid5,
                hl7msg.pid.pid9);
        if patientName is r4:HumanName[] {
            io:println("HL7v23 PID Patient Name: ", patientName[0].toString());
        }
    }
}

public function main() returns error? {
    string enrollmentRequest = check io:fileReadString("enrollments/E0_1.edi");
    m834:EDI_834_Benefit_Enrollment_and_Maintenance enrollment =
         check hmart:read(enrollmentRequest, hmart:EDI_834).ensureType();
    io:println(enrollment.Monetary_Amount_Information[0].Monetary_Amount);
}