code: function(file, _, cb) {
  				overwriteCheck().then(() => {
  					if (file.base[file.base.length - 1] === '/') {
  						file.base = file.base.substring(0, file.base.length - 1);
  					}
  
  					const push = file => {
  						this.push(file);
  						cb();
  					};
  
  					if (compress._isCompressibleFile(file)) {
  						return compressionTransform(file).then(push, cb);
  					}
  
  					otherTransform(file).then(push, cb);
  				}, cb);
  			}
docs: /* @this