public void setCommand(String... command) {
        this.command = command;
    }
Sets the command to be run. This can include either of
{@link ExternalParser#INPUT_FILE_TOKEN} or
{@link ExternalParser#OUTPUT_FILE_TOKEN} if the command
needs filenames.

@see Runtime#exec(String[])
tika-core/src/main/java/org/apache/tika/embedder/ExternalEmbedder.java