code: function getLocalCallName (localCallNode) {
    if (!isLocalCall(localCallNode) && !isAbiNamespaceCall(localCallNode)) throw new Error('staticAnalysisCommon.js: not an local call Node')
    return localCallNode.children[0].attributes.value
  }
docs: Returns the identifier of a local call, Throws on wrong node.
  Example: f(103) => f
  @localCallNode {ASTNode} Function call node
  @return {string} name of the function called