liquibase-core/src/main/java/liquibase/integration/commandline/Main.java
private void checkForMissingCommandParameters(final List<String> messages) {
        if ((commandParams.isEmpty() || commandParams.iterator().next().startsWith("-"))
                && (COMMANDS.CALCULATE_CHECKSUM.equalsIgnoreCase(command))) {
            messages.add(coreBundle.getString("changeset.identifier.missing"));
        }
    }
private void checkForMissingCommandParameters(final List<String> messages) {
        if ((commandParams.isEmpty() || commandParams.iterator().next().startsWith("-"))
                && (COMMANDS.CALCULATE_CHECKSUM.equalsIgnoreCase(command))) {
            messages.add(coreBundle.getString("changeset.identifier.missing"));
        }
    }
Checks for missing command line parameters and, if any problems are found,
returns the list of issues in String form.

@param messages an array of Strings to which messages for issues found will be added