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The buffer chains the keymap mred:global-file-keymap to it's keymap and calls mred:set-keymap-error-handler and mred:set-keymap-implied-shifts on the keymap.
This file locks itself when the file it refers to is not writable and unlocks itself when it is.
The buffer will not be displayed until it is attached to a wx:media-canvas% object or some other view.
A new wx:keymap% object is created for the new buffer. See also get-keymap and set-keymap.
A new wx:style-list object is created for the new buffer. See also get-style-list and set-style-list.