public boolean enablePreview() {
		return !tagReader.collectRawOptions("PREVIEW").isEmpty();
	}
A Script represents a Source (something runnable) in the form of a source
file. It's code that first needs to be compiled before it can be executed.
The Script extracts as much information from the source file as it can, like
all `//`-directives (eg. `//SOURCES`, `//DEPS`, etc.)

NB: The Script contains/returns no other information than that which can be
induced from the source file. So all Scripts that refer to the same source
file will contain/return the exact same information.
src/main/java/dev/jbang/source/Source.java