code: function getValue(node) {
      if (node && node.source && node.source.value) {
          return node.source.value.trim();
      }
  
      return "";
  }
docs: ------------------------------------------------------------------------------ Rule Definition ------------------------------------------------------------------------------ 
  Returns the name of the module imported or re-exported.
  
  @param {ASTNode} node - A node to get.
  @returns {string} the name of the module, or empty string if no name.