Paper/paper-api/src/org/bukkit/Server.java

package org.bukkit;

/**
 * Represents a server implementation
 */
public interface Server {
    /**
     * Gets the name of this server implementation
     *
     * @return name of this server implementation
     */
    public String getName();

    /**
     * Gets the version string of this server implementation.
     *
     * @return version of this server implementation
     */
    public String getVersion();

    /**
     * Gets a list of all currently logged in players
     *
     * @return An array of Players that are currently online
     */
    public Player[] getOnlinePlayers();
}