[issue #2221] [issue #788] Lombok now adds nullity annotations.

Which 'flavour' is defined in lombok.config; applied to toString, equals, canEqual, and plural-form of `@Singular`.

test/transform/resource/after-delombok/BuilderSingularNullBehavior2.java

@@ -0,0 +1,99 @@
+import java.util.List;
+import lombok.Singular.NullCollectionBehavior;
+class BuilderSingularNullBehavior2 {
+	private List<String> locations;
+	private List<String> doohickeys;
+	@java.lang.SuppressWarnings("all")
+	BuilderSingularNullBehavior2(final List<String> locations, final List<String> doohickeys) {
+		this.locations = locations;
+		this.doohickeys = doohickeys;
+	}
+	@java.lang.SuppressWarnings("all")
+	public static class BuilderSingularNullBehavior2Builder {
+		@java.lang.SuppressWarnings("all")
+		private java.util.ArrayList<String> locations;
+		@java.lang.SuppressWarnings("all")
+		private java.util.ArrayList<String> doohickeys;
+		@java.lang.SuppressWarnings("all")
+		BuilderSingularNullBehavior2Builder() {
+		}
+		@java.lang.SuppressWarnings("all")
+		public BuilderSingularNullBehavior2.BuilderSingularNullBehavior2Builder location(final String location) {
+			if (this.locations == null) this.locations = new java.util.ArrayList<String>();
+			this.locations.add(location);
+			return this;
+		}
+		@java.lang.SuppressWarnings("all")
+		public BuilderSingularNullBehavior2.BuilderSingularNullBehavior2Builder locations(final java.util.@org.checkerframework.checker.nullness.qual.NonNull Collection<? extends String> locations) {
+			java.util.Objects.requireNonNull(locations, "locations cannot be null");
+			if (this.locations == null) this.locations = new java.util.ArrayList<String>();
+			this.locations.addAll(locations);
+			return this;
+		}
+		@java.lang.SuppressWarnings("all")
+		public BuilderSingularNullBehavior2.BuilderSingularNullBehavior2Builder clearLocations() {
+			if (this.locations != null) this.locations.clear();
+			return this;
+		}
+
+		@java.lang.SuppressWarnings("all")
+		public BuilderSingularNullBehavior2.BuilderSingularNullBehavior2Builder doohickey(final String doohickey) {
+			if (this.doohickeys == null) this.doohickeys = new java.util.ArrayList<String>();
+			this.doohickeys.add(doohickey);
+			return this;
+		}
+
+		@java.lang.SuppressWarnings("all")
+		public BuilderSingularNullBehavior2.BuilderSingularNullBehavior2Builder doohickeys(final java.util.@org.checkerframework.checker.nullness.qual.Nullable Collection<? extends String> doohickeys) {
+			if (doohickeys != null) {
+				if (this.doohickeys == null) this.doohickeys = new java.util.ArrayList<String>();
+				this.doohickeys.addAll(doohickeys);
+			}
+			return this;
+		}
+
+		@java.lang.SuppressWarnings("all")
+		public BuilderSingularNullBehavior2.BuilderSingularNullBehavior2Builder clearDoohickeys() {
+			if (this.doohickeys != null) this.doohickeys.clear();
+			return this;
+		}
+
+		@java.lang.SuppressWarnings("all")
+		public BuilderSingularNullBehavior2 build() {
+			java.util.List<String> locations;
+			switch (this.locations == null ? 0 : this.locations.size()) {
+			case 0: 
+				locations = java.util.Collections.emptyList();
+				break;
+			case 1: 
+				locations = java.util.Collections.singletonList(this.locations.get(0));
+				break;
+			default: 
+				locations = java.util.Collections.unmodifiableList(new java.util.ArrayList<String>(this.locations));
+			}
+			java.util.List<String> doohickeys;
+			switch (this.doohickeys == null ? 0 : this.doohickeys.size()) {
+			case 0: 
+				doohickeys = java.util.Collections.emptyList();
+				break;
+			case 1: 
+				doohickeys = java.util.Collections.singletonList(this.doohickeys.get(0));
+				break;
+			default: 
+				doohickeys = java.util.Collections.unmodifiableList(new java.util.ArrayList<String>(this.doohickeys));
+			}
+			return new BuilderSingularNullBehavior2(locations, doohickeys);
+		}
+
+		@java.lang.Override
+		@java.lang.SuppressWarnings("all")
+		public java.lang.@org.checkerframework.checker.nullness.qual.NonNull String toString() {
+			return "BuilderSingularNullBehavior2.BuilderSingularNullBehavior2Builder(locations=" + this.locations + ", doohickeys=" + this.doohickeys + ")";
+		}
+	}
+
+	@java.lang.SuppressWarnings("all")
+	public static BuilderSingularNullBehavior2.BuilderSingularNullBehavior2Builder builder() {
+		return new BuilderSingularNullBehavior2.BuilderSingularNullBehavior2Builder();
+	}
+}