Flow_ast.Program
type ('M, 'T) t = 'M * ('M, 'T) t'
and ('M, 'T) t' = {
statements : ('M, 'T) Statement.t list;
interpreter : ('M * string) option;
interpreter directive / shebang
*)comments : ('M, unit) Syntax.t option;
all_comments : 'M Comment.t list;
}