# Functions
CreateOpener creates an Opener and defines the sepecified flags fileFlag, forceFlag and appendFlag.
DefineFlags is a wrapper around CreateOpener for updating a default instance of Opener.
Open is a wrapper around Opener.Open for the default instance of Opener.
# Variables
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# Interfaces
NameWriteCloser implements the io.WriteCloser interface, but also allows a a name to be returned so that the object can be identified.
# Type aliases
A FilenameTransform applies a transform to the filename before it used to open a file.