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"));
        }
    }
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
Checks for missing command line parameters and if any problems are found returns the list of issues in String form .