class Tryouts::Tryout

def from_block(b=nil, &inline)

the external DSL methods: dream, drill, xdrill
Populate this Tryout from a block. The block should contain calls to 
def from_block(b=nil, &inline)
  runtime = b.nil? ? inline : b
  begin
    instance_eval &runtime
  rescue => ex
    raise ex
  end
end