Begin switching to JSpecify annotations (#11448)

* Begin switching to JSpecify annotations

* more

* fixes

patches/api/Add-BlockBreakBlockEvent.patch

@@ -12,20 +12,20 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 @@ -0,0 +0,0 @@
 +package io.papermc.paper.event.block;
 +
++import java.util.List;
 +import org.bukkit.block.Block;
 +import org.bukkit.event.HandlerList;
 +import org.bukkit.event.block.BlockExpEvent;
 +import org.bukkit.inventory.ItemStack;
 +import org.jetbrains.annotations.ApiStatus;
-+import org.jetbrains.annotations.NotNull;
-+
-+import java.util.List;
++import org.jspecify.annotations.NullMarked;
 +
 +/**
 + * Called when a block forces another block to break and drop items.
 + * <p>
 + * Currently called for piston's and liquid flows.
 + */
++@NullMarked
 +public class BlockBreakBlockEvent extends BlockExpEvent {
 +
 +    private static final HandlerList HANDLER_LIST = new HandlerList();
@@ -34,18 +34,17 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    private final List<ItemStack> drops;
 +
 +    @ApiStatus.Internal
-+    public BlockBreakBlockEvent(@NotNull Block block, @NotNull Block source, @NotNull List<ItemStack> drops) {
++    public BlockBreakBlockEvent(final Block block, final Block source, final List<ItemStack> drops) {
 +        super(block, 0);
 +        this.source = source;
 +        this.drops = drops;
 +    }
 +
 +    /**
-+     * Gets the drops of this event
++     * Gets a mutable list of drops for this event
 +     *
 +     * @return the drops
 +     */
-+    @NotNull
 +    public List<ItemStack> getDrops() {
 +        return this.drops;
 +    }
@@ -55,18 +54,15 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +     *
 +     * @return the source
 +     */
-+    @NotNull
 +    public Block getSource() {
 +        return this.source;
 +    }
 +
-+    @NotNull
 +    @Override
 +    public HandlerList getHandlers() {
 +        return HANDLER_LIST;
 +    }
 +
-+    @NotNull
 +    public static HandlerList getHandlerList() {
 +        return HANDLER_LIST;
 +    }