Non-terminal symbol `Expressions_opt`

Defining rules for nonterminal symbol Expressions_opt:

`Expressions_opt`
		`Expressions`

Occurrences of symbol Expressions_opt in body of other rules:

`UntypedExpression`		`CollectionKind` '`{`' `Expressions_opt` '`}`'
`TupleComponents`		`Expressions_opt`
`Arguments`		'`(`' `Expressions_opt` '`)`'

Non-terminal symbol Expressions_opt