Frama-C API - Varname
 val get : scope:scope -> string -> stringReset the generator for variables that are local to a block or a function.
val of_exp : ?default:string -> Frama_c_kernel.Cil_types.exp -> stringGenerate a reasonable variable name element from the given expression. Note that in order to obtain a fresh name the result still needs to be piped through get.
