How to write several relationship in one long form

In the documentation, the long form for writing a relationship is like so:

//Long form
Ref name_optional {
  schema1.table1.column1 < schema2.table2.column2
}

What I would like to do is:

//Long form
Ref name_optional {
  schema1.table1.column1 < schema2.table2.column2
  schema3.table3.column3 < schema4.table4.column4
  schema5.table5.column5 < schema6.table6.column6
}

But an error occurs with the following message:

Expected "}", comment, or whitespace but "s" found.

Does it not support several relationships?
Since the short form works just fine:

Ref name_optional: schema1.table1.column1 < schema2.table2.column2
Ref name_optional2: schema3.table3.column3 < schema4.table4.column4
Ref name_optional3: schema5.table5.column5 < schema6.table6.column6

Hi,

The short answer is no.

Currently, the Long form is just a longer way to define the relationship. We haven’t yet supported grouping several relationships under the same bracket scope.