Method doesn't have to take mutable self
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@ -72,7 +72,7 @@ impl<LIB, DB> MusicHoard<LIB, DB> {
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}
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}
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}
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}
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fn merge_collections(&mut self) -> Collection {
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fn merge_collections(&self) -> Collection {
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let mut primary = self.library_cache.clone();
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let mut primary = self.library_cache.clone();
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for secondary_artist in self.database_cache.iter().cloned() {
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for secondary_artist in self.database_cache.iter().cloned() {
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if let Some(ref mut primary_artist) = primary.get_mut(&secondary_artist.id) {
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if let Some(ref mut primary_artist) = primary.get_mut(&secondary_artist.id) {
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