code: public boolean clearParameters() {
          this.query = null;
          this.fields = null;
          this.scope = null;
          this.fileExtensions = null;
          this.createdRange = null;
          this.updatedRange = null;
          this.sizeRange = null;
          this.ownerUserIds = null;
          this.ancestorFolderIds = null;
          this.contentTypes = null;
          this.type = null;
          this.trashContent = null;
          this.metadataFilter = null;
          this.sort = null;
          this.direction = null;
          return true;
      }
docs: Clears the Parameters before performing a new search.
  @return this.true;