message: Small change on UniversalEngine for consistency
diff: @@ -21,15 +21,26 @@ impl UniversalEngineBuilder {
  pub fn new(compiler: Option<Box<dyn Compiler>>, features: Features) -> Self {
  UniversalEngineBuilder { compiler, features }
  }
  +
  /// Gets the compiler associated to this engine.
  #[cfg(feature = "compiler")]
  pub fn compiler(&self) -> Result<&dyn Compiler, CompileError> {
  if self.compiler.is_none() {
  - return Err(CompileError::Codegen("The UniversalEngine is operating in headless mode, so it can only execute already compiled Modules.".to_string()));
  + return Err(CompileError::Codegen(
  + "The UniversalEngine is not compiled in.".to_string(),
  + ));
  }
  Ok(&**self.compiler.as_ref().unwrap())
  }
  + /// Gets the compiler associated to this engine.
  + #[cfg(not(feature = "compiler"))]
  + pub fn compiler(&self) -> Result<&dyn Compiler, CompileError> {
  + return Err(CompileError::Codegen(
  + "The UniversalEngine is not compiled in.".to_string(),
  + ));
  + }
  +
  /// Validate the module
  #[cfg(feature = "compiler")]
  pub fn validate<'data>(&self, data: &'data [u8]) -> Result<(), CompileError> {
  