Brainstorm_Update_Astra_Addon::version_check()

		public static function version_check() {

			$bsf_core_version_file = realpath( ASTRA_EXT_DIR . '/admin/bsf-core/version.yml' );

			// Is file 'version.yml' exist?
			if ( is_file( $bsf_core_version_file ) ) {
				global $bsf_core_version, $bsf_core_path;
				$bsf_core_dir = realpath( dirname( __FILE__ ) . '/admin/bsf-core/' );
				$version      = file_get_contents( $bsf_core_version_file ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents

				// Compare versions.
				if ( version_compare( $version, $bsf_core_version, '>' ) ) {
					$bsf_core_version = $version;
					$bsf_core_path    = $bsf_core_dir;
				}
			}
		}