message: Changed module set_name to return a boolean
diff: @@ -297,10 +297,9 @@ impl Module {
  /// Sets the name of the current module.
  /// This is normally useful for stacktraces and debugging.
  ///
  - /// ## Important
  - ///
  - /// If the module is already insantiated, setting a name will have
  - /// no effects (it will silently fail).
  + /// It will return `true` if the module name was changed successfully,
  + /// and return `false` otherwise (in case the module is already
  + /// instantiated).
  ///
  /// # Example
  ///
  @@ -316,12 +315,14 @@ impl Module {
  /// # Ok(())
  /// # }
  /// ```
  - pub fn set_name(&mut self, name: &str) {
  + pub fn set_name(&mut self, name: &str) -> bool {
  Arc::get_mut(&mut self.artifact)
  .and_then(|artifact| artifact.module_mut())
  .map(|mut module_info| {
  module_info.name = Some(name.to_string());
  - });
  + true
  + })
  + .unwrap_or(false)
  }
  /// Returns an iterator over the imported types in the Module.
  