An earlier iteration of this package was able to optionally use HIL as
its expression engine in place of the hclsyntax expression parser, but
this has since been removed and so this flag no longer has any effect.
Consequently, the public functions ParseWithHIL and ParseFileWithHIL were,
in fact, just using the zclsyntax parser and thus behaving identically to
the Parse and ParseFile functions.
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