.withRequiredArg();
show = parser.accepts( "show", "shows properties assigned to a schema, table, stereotype, format, or provider" );
properties = parser.acceptsAll( asList( "props", "properties" ), "key=value pairs" )
.withRequiredArg().withValuesConvertedBy( new PropertiesConverter() );
propertiesFromFile = parser.accepts( "properties-file", "filename" )
.withRequiredArg().withValuesConvertedBy( new PropertiesFileConverter() );
extensions = parser.acceptsAll( asList( "exts", "extensions" ), "file name extension to associate with format, .csv, .tsv, ..." )