private static boolean isPromotable(Type sourceType, Type targetType) {
        return PROMOTABLE.contains(new AbstractMap.SimpleImmutableEntry<>(sourceType, targetType));
    }
This method projects a value between compatible schemas and throws exceptions when non-compatible schemas are provided
@param source the schema used to construct the record
@param record the value to project from source schema to target schema
@param target the schema to project the record to
@return the projected value with target schema
@throws SchemaProjectorException if the target schema is not optional and does not have a default value
connect/api/src/main/java/org/apache/kafka/connect/data/SchemaProjector.java