code: function isLocalCall (node) {
    return nodeType(node, exactMatch(nodeTypes.FUNCTIONCALL)) &&
          minNrOfChildren(node, 1) &&
          nodeType(node.children[0], exactMatch(nodeTypes.IDENTIFIER)) &&
          expressionType(node.children[0], basicRegex.FUNCTIONTYPE) &&
          !expressionType(node.children[0], basicRegex.EXTERNALFUNCTIONTYPE) &&
          nrOfChildren(node.children[0], 0)
  }
docs: True if call to local function
  @node {ASTNode} some AstNode
  @return {bool}