in dbeam-core/src/main/java/com/spotify/dbeam/avro/BeamJdbcAvroSchema.java [96:104]
public static Optional<Schema> parseOptionalInputAvroSchemaFile(final String filename)
throws IOException {
if (filename == null || filename.isEmpty()) {
return Optional.empty();
}
return Optional.of(parseInputAvroSchemaFile(filename));
}