code: function checkHeaderFromStream(file, ctx) {
  		file.contents.pipe(es.wait(function (err, data) {
  			if (err) {
  				throw err;
  			}
  
  			var bufferFile = new File({
  				path: file.path,
  				contents: data
  			});
  
  			checkHeaderFromBuffer(bufferFile, ctx);
  		}));
  	}
docs: Check header from stream.
  
  @param {object} file - current file from stream.
  @param {object} ctx - context.
  
  @returns {string[]} file in string[] format.