=BUILTINS.I() -> {"IF",IF;"IFERROR",IFERROR;...}
DEFINE( BUILTINS.I, LAMBDA( VSTACK( HSTACK("IF", IF), HSTACK("IFERROR", IFERROR), HSTACK("IFNA", IFNA), HSTACK("IFS", IFS), HSTACK("IMABS", IMABS), HSTACK("IMAGE", IMAGE), HSTACK("IMAGINARY", IMAGINARY), HSTACK("IMARGUMENT", IMARGUMENT), HSTACK("IMCONJUGATE", IMCONJUGATE), HSTACK("IMCOS", IMCOS), HSTACK("IMCOSH", IMCOSH), HSTACK("IMCOT", IMCOT), HSTACK("IMCSC", IMCSC), HSTACK("IMCSCH", IMCSCH), HSTACK("IMDIV", IMDIV), HSTACK("IMEXP", IMEXP), HSTACK("IMLN", IMLN), HSTACK("IMLOG10", IMLOG10), HSTACK("IMLOG2", IMLOG2), HSTACK("IMPOWER", IMPOWER), HSTACK("IMPRODUCT", IMPRODUCT), HSTACK("IMREAL", IMREAL), HSTACK("IMSEC", IMSEC), HSTACK("IMSECH", IMSECH), HSTACK("IMSIN", IMSIN), HSTACK("IMSINH", IMSINH), HSTACK("IMSQRT", IMSQRT), HSTACK("IMSUB", IMSUB), HSTACK("IMSUM", IMSUM), HSTACK("IMTAN", IMTAN), HSTACK("INDEX", INDEX), HSTACK("INDIRECT", INDIRECT), HSTACK("INFO", INFO), HSTACK("INT", INT), HSTACK("INTERCEPT", INTERCEPT), HSTACK("INTRATE", INTRATE), HSTACK("IPMT", IPMT), HSTACK("IRR", IRR), HSTACK("ISBLANK", ISBLANK), HSTACK("ISERR", ISERR), HSTACK("ISERROR", ISERROR), HSTACK("ISEVEN", ISEVEN), HSTACK("ISFORMULA", ISFORMULA), HSTACK("ISLOGICAL", ISLOGICAL), HSTACK("ISNA", ISNA), HSTACK("ISNONTEXT", ISNONTEXT), HSTACK("ISNUMBER", ISNUMBER), HSTACK("ISODD", ISODD), HSTACK("ISOMITTED", ISOMITTED), HSTACK("ISOWEEKNUM", ISOWEEKNUM), HSTACK("ISPMT", ISPMT), HSTACK("ISREF", ISREF), HSTACK("ISTEXT", ISTEXT))))
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