code: function getUseStrictDirectives(statements) {
      const directives = [];
  
      for (let i = 0; i < statements.length; i++) {
          const statement = statements[i];
  
          if (
              statement.type === "ExpressionStatement" &&
              statement.expression.type === "Literal" &&
              statement.expression.value === "use strict"
          ) {
              directives[i] = statement;
          } else {
              break;
          }
      }
  
      return directives;
  }
docs: ------------------------------------------------------------------------------ Helpers ------------------------------------------------------------------------------ 
  Gets all of the Use Strict Directives in the Directive Prologue of a group of
  statements.
  @param {ASTNode[]} statements Statements in the program or function body.
  @returns {ASTNode[]} All of the Use Strict Directives.