funcs.js

const lines = $$('.description .methodsynopsis').map(m => { return {
    "name": m.querySelector('.methodname').innerText,
	"params": Array.from(m.querySelectorAll('.parameter')).map(p => p.innerText)
}}).filter(info => info.params.includes("$filename")).map(info => {
	let pos = info.params.indexOf("$filename");
	let params = info.params.slice(0, pos + 1).map(p => p.toUpperCase());
    return `${info.name}(${params.join(", ")}, ...)`;
}).join("\n");
document.body.textContent = lines;