public register()

in src/main.ts [51:72]
20 lines of code
11 McCabe index (conditional complexity)

	public register(messages: RPCMessageType | RPCMessageType[], data: RegistrationData<T>): void {
		// Error catching
		if (is.array<RPCMessageType>(this.messages) && is.array<RPCMessageType>(messages)) {
			let valid = messages.every(v => !!(this.messages as RPCMessageType[]).find(i => i.method === v.method));
			if (!valid) {
				throw new Error(`Register called on wrong feature.`);
			}
		} else if (is.array<RPCMessageType>(this.messages) && !is.array<RPCMessageType>(messages)) {
			if (!this.messages.find(i => i.method === messages.method)) {
				throw new Error(`Register called on wrong feature.`);
			}
		} else if (!is.array<RPCMessageType>(this.messages) && !is.array<RPCMessageType>(messages)) {
			if (this.messages.method !== messages.method) {
				throw new Error(`Register called on wrong feature. Requested ${messages.method} but reached feature ${this.messages.method}`);
			}
		}

		let provider = this.registerProvider(data.registerOptions);
		if (provider) {
			this._providers.set(data.id, provider);
		}
	}