in src/main/java/com/epam/eco/commons/avro/converter/DefaultAvroConverters.java [275:282]
public Object toAvro(Object value, Schema schema, AvroConverters converters) {
String strValue = value == null ? null : value.toString();
List<String> validSymbols = schema.getEnumSymbols();
if (validSymbols == null || validSymbols.isEmpty() || !validSymbols.contains(strValue)) {
throw new AvroConversionException(value, schema);
}
return new EnumSymbol(schema, strValue);
}