the function map is not word ?like `map('z', 'gxt'); map('c', 'gxT');` it will say: Error found in settings: ReferenceError: mapkey is not defined

just like the title; when I add the custom setting map map('z', 'gxt'); map('c', 'gxT'); it will say: Error found in settings: ReferenceError: mapkey is not defined this is my setting

// an example to create a new mapping `ctrl-y`
mapkey('<ctrl-y>', 'Show me the money', function() {
    Front.showPopup('a well-known phrase uttered by characters in the 1996 film Jerry Maguire (Escape to close).');
});

map('z', 'gxt');
map('c', 'gxT');
// an example to replace `T` with `gt`, click `Default mappings` to see how `T` works.
map('gt', 'T');
// an example to remove mapkey `Ctrl-i`
unmap('<ctrl-i>');

// set theme
settings.theme = `
.sk_theme {
    font-family: Input Sans Condensed, Charcoal, sans-serif;
    font-size: 10pt;
    background: #24272e;
    color: #abb2bf;
}
.sk_theme tbody {
    color: #fff;
}
.sk_theme input {
    color: #d0d0d0;
}
.sk_theme .url {
    color: #61afef;
}
.sk_theme .annotation {
    color: #56b6c2;
}
.sk_theme .omnibar_highlight {
    color: #528bff;
}
.sk_theme .omnibar_timestamp {
    color: #e5c07b;
}
.sk_theme .omnibar_visitcount {
    color: #98c379;
}
.sk_theme #sk_omnibarSearchResult ul li:nth-child(odd) {
    background: #303030;
}
.sk_theme #sk_omnibarSearchResult ul li.focused {
    background: #3e4452;
}
#sk_status, #sk_find {
    font-size: 20pt;
}`;
// click `Save` button to make above settings to take effect.</ctrl-i></ctrl-y>

[genmzy]

I just found this: https://github.com/brookhong/Surfingkeys/wiki/Migrate-your-settings-from-0.9.74-to-1.0

[alswl]

const {
    aceVimMap,
    mapkey,
    imap,
    iunmap,
    imapkey,
    getClickableElements,
    vmapkey,
    map,
    unmap,
    cmap,
    addSearchAlias,
    removeSearchAlias,
    tabOpenLink,
    readText,
    Clipboard,
    Front,
    Hints,
    Visual,
    RUNTIME,
} = api;

This works for me, put the code block in the first part of configuration.