@salesforce/sf-plugins-core
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    Variable optionalHubFlagConst

    optionalHubFlag: FlagDefinition<Org, CustomOptions, {}> = ...

    An optional org that, if present, must be a devHub Will throw if the specified org does not exist Will default to the default dev hub if one is not specified Will NOT throw if no default deb hub exists and none is specified

    import { Flags } from '@salesforce/sf-plugins-core';
    public static flags = {
    // setting length or prefix
    'target-org': optionalHubFlag(),
    // adding properties
    'flag2': optionalHubFlag({
    description: 'flag2 description',
    char: 'h'
    }),
    }