What's the order of Parslet::Transform rules?

[niuage]

tl;dr: I want to make sure it's always the rule defined last that will be matched first.

My parsed inputs can look something like that:

• {:command=>{:map_start=>"start"@66}}
• or {:command=>{:map_start=>[{:name=>"mountain ledge"@77}, {:item_quantity=>"20"@94}]}

So I have 2 rules, one that matches the simple "start", and one that matches the subtree [{}, {}...].

rule(map_start: simple(:no_options)) do
 # some code
end

rule(map_start: subtree(:options)) do
  # some code
end

Seems like the subtree one is always matched first. If I put the rule with simple second, then it matches correctly. Just want to make sure it's always the last rule that will be matched first?