Class for making overridable settings in Sublime Text

OverrideableSettings.py

class OverrideableSettings():
    """
    Class for adding a layer of overrides on top of a Settings object

    The class is read-only. If a dictionary-like _overrides member is present,
    the get() method will look there first for a setting before reading from
    the _settings member.
    """

    def __init__(self, settings=None, overrides=None):
        self._settings = settings
        self._overrides = overrides

    def set_settings(self, settings):
        self._settings = settings

    def set_overrides(self, overrides):
        self._overrides = overrides

    def get(self, setting, default=None):
        if self._overrides and setting in self._overrides:
            return self._overrides[setting]
        elif self._settings:
            return self._settings.get(setting, default)
        else:
            return default