Function registerPreprocessor

src/core/echarts.ts:3057–3061

(preprocessorFunc: OptionPreprocessor)

 * Register option preprocessor
 */
export function registerPreprocessor(preprocessorFunc: OptionPreprocessor): void {
    if (indexOf(optionPreprocessorFuncs, preprocessorFunc) < 0) {
        optionPreprocessorFuncs.push(preprocessorFunc);
    }
}

/**
 * NOTICE: Alway run in block way (no progessive is allowed).