String getProperty( String key ) {
		// look in current text area
		String value = getProperties().getProperty( key );
		if( value != null )
			return value;

		if( basePropertyProvider == null )
			return null;

		// look in base properties files
		return basePropertyProvider.getProperty( key, getBaseTheme() );
	}
Supports parsing content of text area in FlatLaf properties syntax.

@author Karl Tauber
flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatThemePropertiesSupport.java