DeltaZern/paper-api/src/main/java/org/bukkit/command/CommandSender.java

package org.bukkit.command;

import org.bukkit.Server;


public interface CommandSender {
    /**
     * Sends this sender a message
     *
     * @param message Message to be displayed
     */
    public void sendMessage(String message);

    /**
     * Checks if this sender is currently op
     *
     * @return true if they are
     */
    public boolean isOp();

    /**
     * Checks if this sender is a player
     *
     * @return true if they are
     * @deprecated Use instanceof
     */
    @Deprecated
    public boolean isPlayer();

    /**
     * Returns the server instance that this player is running through
     *
     * @return Server instance
     */
    public Server getServer();
}