code: function () {
          return {
              lineSeparator: '\n', // done
              maxLength: 120, // TODO
              wrapIfLong: false, // TODO
              indent: 4, // done
              useTabIndent: false, // done
              spaces: {
                  around: {
                      unaryOperators: false, // TODO
                      binaryOperators: true, // done
                      ternaryOperators: true // done
                  },
                  before: {
                      functionDeclarationParentheses: false, // done function foo() {
                      functionExpressionParentheses: true, // done var foo = function () {
                      parentheses: true, // done if (), for (), while (), ...
                      leftBrace: true, // done function () {, if () {, do {, try { ...
                      keywords: true // done if {} else {}, do {} while (), try {} catch () {} finally
                  },
                  within: {
                      // function call, function declaration, if, for, while, switch, catch
                      parentheses: false // done
                  },
                  other: {
                      beforePropertyNameValueSeparator: false, // done {key: value} {key : value} {key:value}
                      afterPropertyNameValueSeparator: true // done
                  }
              },
              bracesPlacement: { // 1. same line 2. next line
                  functionDeclaration: 1, // TODO
                  other: 1 // TODO
              },
              blankLines: {
                  keepMaxBlankLines: 1, // done
                  atEndOfFile: true // done
              },
              other: {
                  keepArraySingleLine: false // TODO default formatted array multi line
              },
              fix: {
                  prefixSpaceToLineComment: false, // done
                  alterCommonBlockCommentToLineComment: false, // done
                  singleVariableDeclarator: false, // done
                  fixInvalidTypeof: false, // done
                  removeEmptyStatement: false, // done
                  autoSemicolon: false, // done
                  singleQuotes: false, // done
                  eqeqeq: false, // done
                  invalidConstructor: false, // done
                  addCurly: false, // done
                  removeDebugger: false, // done
                  noElseReturn: false
              }
          };
      }
docs: returns default config
  
  @returns {Object}