includes/managers/class-fs-option-manager.php
function get_options_keys() {
            if ( is_array( $this->_options ) ) {
                return array_keys( $this->_options );
            } else if ( is_object( $this->_options ) ) {
                return array_keys( get_object_vars( $this->_options ) );
            }

            return array();
        }
function get_options_keys() {
            if ( is_array( $this->_options ) ) {
                return array_keys( $this->_options );
            } else if ( is_object( $this->_options ) ) {
                return array_keys( get_object_vars( $this->_options ) );
            }

            return array();
        }
function get_options_keys ( ) { if ( is_array ( $ this -> _options ) ) { return array_keys ( $ this -> _options ) ; } else if ( is_object ( $ this -> _options ) ) { return array_keys ( get_object_vars ( $ this -> _options ) ) ; } return array ( ) ; }
Get options keys.

@author Vova Feldman (@svovaf)
@since  1.0.3

@return string[]
Get options keys .