code: public static ImmutableList<Fix> fixesByReplacingExpressionWithMethodParameter(
        ExpressionTree input, Predicate<JCVariableDecl> validParameterPredicate, VisitorState state) {
      Preconditions.checkState(input.getKind() == IDENTIFIER || input.getKind() == MEMBER_SELECT);
  
      // find a method parameter matching the input predicate and similar name and suggest it
      // as the new argument
      Multimap<Integer, JCVariableDecl> potentialReplacements =
          ASTHelpers.findEnclosingNode(state.getPath(), JCMethodDecl.class).getParameters().stream()
              .filter(validParameterPredicate)
              .collect(collectByEditDistanceTo(simpleNameOfIdentifierOrMemberAccess(input)));
  
      return buildValidReplacements(
          potentialReplacements, var -> SuggestedFix.replace(input, var.sym.toString()));
    }
docs: Suggest replacing {@code input} with a reference to a method parameter in the nearest enclosing
  method declaration with a similar or the same name as the {@code input} expression.
  
  @param input a MEMBER_SELECT or IDENTIFIER expression which should be replaced.
  @param validParameterPredicate Predicate used to decide which method parameters are appropriate
  candidates for replacement (e.g.: is the appropriate type)