Class PlatformDataSource

const platformDataSource =     CardService.newPlatformDataSource().setCommonDataSource(         CardService.CommonDataSource.USER,     );  const multiSelect = CardService.newSelectionInput()                         .setType(CardService.SelectionInputType.MULTI_SELECT)                         .setFieldName('contacts')                         .setTitle('Selected contacts')                         .setMultiSelectMaxSelectedItems(5)                         .setMultiSelectMinQueryLength(1)                         .setPlatformDataSource(platformDataSource);

const chatSpaceDataSource =     CardService.newChatSpaceDataSource().setDefaultToCurrentSpace(true);  const chatClientDataSource =     CardService.newChatClientDataSource().setSpaceDataSource(         chatSpaceDataSource);  const hostAppDataSource =     CardService.newHostAppDataSource().setChatDataSource(chatClientDataSource);  const platformDataSource =     CardService.newPlatformDataSource().setHostAppDataSource(hostAppDataSource);  const multiSelect = CardService.newSelectionInput()                         .setType(CardService.SelectionInputType.MULTI_SELECT)                         .setFieldName('contacts')                         .setTitle('Selected contacts')                         .setMultiSelectMaxSelectedItems(5)                         .setMultiSelectMinQueryLength(1)                         .setPlatformDataSource(platformDataSource);