GroupApi: Add all non-collection methods

Change-Id: Idba024e7226bf72241f978c90b414ae969f4bfe3

gerrit-extension-api/src/main/java/com/google/gerrit/extensions/api/groups/GroupApi.java

@@ -15,9 +15,93 @@
 package com.google.gerrit.extensions.api.groups;
 
 import com.google.gerrit.extensions.common.GroupInfo;
+import com.google.gerrit.extensions.common.GroupOptionsInfo;
 import com.google.gerrit.extensions.restapi.RestApiException;
 
 public interface GroupApi {
+  /** @return group info with no {@code ListGroupsOption}s set. */
   GroupInfo get() throws RestApiException;
+
+  /** @return group info with all {@code ListGroupsOption}s set. */
   GroupInfo detail() throws RestApiException;
+
+  /** @return group name. */
+  String name() throws RestApiException;
+
+  /**
+   * Set group name.
+   *
+   * @param name new name.
+   * @throws RestApiException
+   */
+  void name(String name) throws RestApiException;
+
+  /** @return owning group info. */
+  GroupInfo owner() throws RestApiException;
+
+  /**
+   * Set group owner.
+   *
+   * @param owner identifier of new group owner.
+   * @throws RestApiException
+   */
+  void owner(String owner) throws RestApiException;
+
+  /** @return group description. */
+  String description() throws RestApiException;
+
+  /**
+   * Set group decsription.
+   *
+   * @param description new description.
+   * @throws RestApiException
+   */
+  void description(String description) throws RestApiException;
+
+  /** @return group options. */
+  GroupOptionsInfo options() throws RestApiException;
+
+  /**
+   * Set group options.
+   *
+   * @param options new options.
+   * @throws RestApiException
+   */
+  void options(GroupOptionsInfo options) throws RestApiException;
+
+  /**
+   * Add members to a group.
+   *
+   * @param members list of member identifiers, in any format accepted by
+   *     {@link com.google.gerrit.extensions.api.accounts.Accounts#id(String)}
+   * @throws RestApiException
+   */
+  void addMembers(String... members) throws RestApiException;
+
+  /**
+   * Remove members from a group.
+   *
+   * @param members list of member identifiers, in any format accepted by
+   *     {@link com.google.gerrit.extensions.api.accounts.Accounts#id(String)}
+   * @throws RestApiException
+   */
+  void removeMembers(String... members) throws RestApiException;
+
+  /**
+   * Add groups to be included in this one.
+   *
+   * @param members list of group identifiers, in any format accepted by
+   *     {@link Groups#id(String)}
+   * @throws RestApiException
+   */
+  void addGroups(String... groups) throws RestApiException;
+
+  /**
+   * Remove included groups from this one.
+   *
+   * @param members list of group identifiers, in any format accepted by
+   *     {@link Groups#id(String)}
+   * @throws RestApiException
+   */
+  void removeGroups(String... groups) throws RestApiException;
 }