WP_Filesystem_Direct::chgrp( string $file, string|int $group, bool $recursive = false ): bool

128	public function chgrp( $file, $group, $recursive = false ) {129		if ( ! $this->exists( $file ) ) {130			return false;131		}132 133		if ( ! $recursive ) {134			return chgrp( $file, $group );135		}136 137		if ( ! $this->is_dir( $file ) ) {138			return chgrp( $file, $group );139		}140 141		// Is a directory, and we want recursive.142		$file     = trailingslashit( $file );143		$filelist = $this->dirlist( $file );144		if ( false === $filelist ) {145			return false;146		}147 148		foreach ( $filelist as $file_listing ) {149			$this->chgrp( $file . $file_listing['name'], $group, $recursive );150		}151 152		return true;153	}