@Nonnull
	public MethodVertex getVertex(@Nonnull MethodMember member) throws IllegalArgumentException {
		if (member.getDeclaringClass() != jvmClass)
			throw new IllegalArgumentException("Member does not belong to class from this vertex");
		return methodVertices.computeIfAbsent(member, m -> new CallGraph.MutableMethodVertex(
				new MethodRef(jvmClass.getName(), member.getName(), member.getDescriptor()),
				member)
		);
	}
@param member
		Member declaration from the associated {@link JvmClassInfo}.

@return Method vertex of the declared method.

@throws IllegalArgumentException
		When the member declaration does not belong to the associated {@link JvmClassInfo}.
recaf-core/src/main/java/software/coley/recaf/services/callgraph/ClassMethodsContainer.java