code: function isAllowedAsNonBacktick(node) {
              const parent = node.parent;
  
              switch (parent.type) {
  
                  // Directive Prologues.
                  case "ExpressionStatement":
                      return isPartOfDirectivePrologue(node);
  
                  // LiteralPropertyName.
                  case "Property":
                  case "MethodDefinition":
                      return parent.key === node && !parent.computed;
  
                  // ModuleSpecifier.
                  case "ImportDeclaration":
                  case "ExportNamedDeclaration":
                  case "ExportAllDeclaration":
                      return parent.source === node;
  
                  // Others don't allow.
                  default:
                      return false;
              }
          }
docs: Checks whether or not a given node is allowed as non backtick.
  @param {ASTNode} node - A node to check.
  @returns {boolean} Whether or not the node is allowed as non backtick.
  @private