wp-includes/class-wp-roles.php:373Gets the available roles data.
array protected function get_roles_data() { global $wp_user_roles; if ( ! empty( $wp_user_roles ) ) { return $wp_user_roles; } if ( is_multisite() && get_current_blog_id() !== $this->site_id ) { remove_action( 'switch_blog', 'wp_switch_roles_and_user', 1 ); $roles = get_blog_option( $this->site_id, $this->role_key, array() ); add_action( 'switch_blog', 'wp_switch_roles_and_user', 1, 2 ); return $roles; } return get_option( $this->role_key, array() ); }Introduced in 4.9.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-roles.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.