accessing
externalWordCloud
"TO DO: refactor with externalWordCloudWithLanguage:"

	| text outputFile |
	self areCommonFilesInstalled 
		ifFalse: [ self installCommons ].
	self writeWordsFile.
	outputFile := (self folder / 'wordcloud.png') fullName.
	text := (self folder / 'words', 'txt') fullName.
	OSSUnixSubprocess new 
		command: 'wordcloud_cli';
		arguments: { '--text' . text . 
					'--imagefile' . outputFile .
					'--color' . '#5B83DE' .
					'--width' . '1153' .
					'--height' . '357' .
					'--background' . 'white' .
					'--mode' . 'RGBA' .
					'--stopwords' . '../../../commons/stopwords-es.txt'.
					"'--mask' . '../../../commons/nube-mascara.jpg'"
					};
		workingDirectory: self folder fullName;
		redirectStdout;
		redirectStderr;
		runAndWaitOnExitDo: [ :process :outString | ^ outputFile asFileReference ]