deadunitCore.browser.umd.js
function findFullSourceLine(fileLines, startLine) {
        var lines = []
        var parenCount = 0
        var mode = 0 // mode 0 for paren searching, mode 1 for double-quote searching, mode 2 for single-quote searching
        var lastWasBackslash = false // used for quote searching
        for(var n=startLine; n<fileLines.length; n++) {
            var line = fileLines[n]
            lines.push(line.trim())

            for(var i=0; i<line.length; i++) {
                var c = line[i]

                if(mode === 0) {
                    if(c === '(') {
                        parenCount++
                        //if(parenCount === 0) {
                          //  return lines.join('\n') // done
                        //}
                    } else if(c === ')' && parenCount > 0) {
                        parenCount--
                        if(parenCount === 0) {
                            return lines.join('\n') // done
                        }
                    } else if(c === '"') {
                        mode = 1
                    } else if(c === "'") {
                        mode = 2
                    }
                } else if(mode === 1) {
                    if(c === '"' && !lastWasBackslash) {
                        mode = 0
                    }

                    lastWasBackslash = c==='\\'
                } else { // mode === 2
                    if(c === "'" && !lastWasBackslash) {
                        mode = 0
                    }

                    lastWasBackslash = c==='\\'
                }
            }
        }

        return lines.join('\n') // if it gets here, something minor went wrong
    }
function findFullSourceLine(fileLines, startLine) {
        var lines = []
        var parenCount = 0
        var mode = 0 // mode 0 for paren searching, mode 1 for double-quote searching, mode 2 for single-quote searching
        var lastWasBackslash = false // used for quote searching
        for(var n=startLine; n<fileLines.length; n++) {
            var line = fileLines[n]
            lines.push(line.trim())

            for(var i=0; i<line.length; i++) {
                var c = line[i]

                if(mode === 0) {
                    if(c === '(') {
                        parenCount++
                        //if(parenCount === 0) {
                          //  return lines.join('\n') // done
                        //}
                    } else if(c === ')' && parenCount > 0) {
                        parenCount--
                        if(parenCount === 0) {
                            return lines.join('\n') // done
                        }
                    } else if(c === '"') {
                        mode = 1
                    } else if(c === "'") {
                        mode = 2
                    }
                } else if(mode === 1) {
                    if(c === '"' && !lastWasBackslash) {
                        mode = 0
                    }

                    lastWasBackslash = c==='\\'
                } else { // mode === 2
                    if(c === "'" && !lastWasBackslash) {
                        mode = 0
                    }

                    lastWasBackslash = c==='\\'
                }
            }
        }

        return lines.join('\n') // if it gets here, something minor went wrong
    }
attempts to find the full function call expression (over multiple lines) given the sources lines and a starting point