Rock.Model.GroupMemberService.GetKnownRelationship C# (CSharp) Method

        public IQueryable<GroupMember> GetKnownRelationship( int personId, int relationshipRoleId )
        {
            var groupMemberService = this;
               var rockContext = this.Context as RockContext;

               var knownRelationshipGroupType = GroupTypeCache.Read( Rock.SystemGuid.GroupType.GROUPTYPE_KNOWN_RELATIONSHIPS );
               var ownerRole = knownRelationshipGroupType.Roles.FirstOrDefault( r => r.Guid.Equals( Rock.SystemGuid.GroupRole.GROUPROLE_KNOWN_RELATIONSHIPS_OWNER.AsGuid() ) );
               var relationshipRole = knownRelationshipGroupType.Roles.FirstOrDefault( r => r.Id == relationshipRoleId );
               if ( ownerRole == null )
               {
              throw new Exception( "Unable to find known relationships owner role" );
               }

               if ( relationshipRole == null )
               {
              throw new Exception( "Specified relationshipRoleId is not a known relationships role" );
               }

               // find the personId's "known relationship" group
               int? knownRelationshipGroupId = groupMemberService.Queryable()
               .Where( m =>
                   m.PersonId == personId &&
                   m.GroupRoleId == ownerRole.Id )
               .Select( m => m.GroupId )
               .FirstOrDefault();

               // if there was a known relationship group found
               IQueryable<GroupMember> groupMembers = null;
               if ( knownRelationshipGroupId.HasValue )
               {
              // take everyone that has the specified relationship role.
              groupMembers = groupMemberService.Queryable()
                 .Where( gm =>
                    gm.GroupId == knownRelationshipGroupId &&
                    gm.GroupRoleId == relationshipRoleId );
               }

               return groupMembers;
        }

        public IQueryable<GroupMember> GetKnownRelationship( int personId, int relationshipRoleId )
        {
            SetProxyCreation( true );
               var rockContext = this.Service.Context as RockContext;

               var groupMemberService = new GroupMemberService( rockContext );
               var groupMembers = groupMemberService.GetKnownRelationship( personId, relationshipRoleId );

               return groupMembers;
        }