code: public LocalVariableInfo addLocalVariable(String typeQualifiedName, String name) {
      return contextLayers.getFirst().addLocalVariable(typeQualifiedName, name);
    }
docs: Add a local variable in the current context.
  
  @param typeQualifiedName The type of the variable
  @param name The name of the variable
  @return {@link LocalVariableInfo} for the added variable