setIncrementalFile(incrementalFile) {
		if (incrementalFile) {
			// This used to also setIgnoreInitial(true) but was changed in 3.0.0-alpha.14
			this.setIncrementalBuild(true);

			this.programmaticApiIncrementalFile = TemplatePath.addLeadingDotSlash(incrementalFile);
		}
	}
Set the file that needs to be rendered/compiled/written for an incremental build.
This method is also wired up to the CLI --incremental=incrementalFile

@method
@param {string} incrementalFile - File path (added or modified in a project)