content: import 'package:flutter/material.dart';
  
  const kGithubApiBaseUrl = 'https://api.github.com';
  const kStarHistoryBaseUrl = 'https://star-history.com';
  const kProfileSummaryBaseUrl = 'https://profile-summary-for-github.com';
  
  // ALL KEYS ARE DEMONSTRATIVE AND ARE USED FOR THE TEST.
  const kGithubClientId = 'b2fe416e9e6796ee6363';
  const kGithubClientSecret = 'a93cf9cbffecb02d44c24918c9a31a6933580737';
  const kGithubScope = 'user+repo+notifications+read:org';
  const kGithubRedirectUrl = 'flutterhub';
  const kPerPage = 20;
  
  const kUnexpectedError = 'Unexpected error';
  const kUnknownServerError = 'Unknown server error';
  const kNoInternetConnection = 'No internet connection';
  
  /// space between widgets
  const spaceSmall = 2.0;
  const spaceSmall2 = 4.0;
  const spaceMedium = 8.0;
  const spaceDefault = 16.0;
  const spaceLarge = 24.0;
  const spaceLarge2 = 32.0;
  const spaceLarge3 = 40.0;
  const spaceLarge4 = 96.0;
  
  const spaceMaxWidth = 736.0;
  const spaceMaxGridItemWidth = 192.0;
  
  /// padding widgets
  const paddingSmall = EdgeInsets.all(spaceSmall2);
  const paddingSmallMedium =
      EdgeInsets.symmetric(vertical: spaceSmall2, horizontal: spaceMedium);
  const paddingSmallDefault =
      EdgeInsets.symmetric(vertical: spaceSmall2, horizontal: spaceDefault);
  const paddingDefault = EdgeInsets.all(spaceDefault);
  const paddingDefaultLargeBottom =
      EdgeInsets.fromLTRB(spaceDefault, spaceDefault, spaceDefault, spaceLarge4);
  